2AW95LS0125051882ASmart Light Bulb

SPRING SUNSHINE TECHNOLOGY CO., LIMITED Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [July 2, 2026] U.S. Agent Designation [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought FCC ID: 2AW95LS0125051882A Name and company of U.S. agent: [GLOCERTS TECHNOLOGY INC] Physical U.S. address of agent: [19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507] FRN of U.S. agent: [0036339737] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: (626) 588-8039 [GLOCERTS TECHNOLOGY INC] acknowledges their obligation to accept service of process on behalf of [SPRING SUNSHINE TECHNOLOGY CO., LIMITED]. [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] with the FRN [0029869823] accepts its obligation to maintain an agent for service of process in the United States for no less than 1 year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature Signature [Ben Fu] [Huiying Fan] [manager] [Director] [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] [GLOCERTS TECHNOLOGY INC]

SPRING SUNSHINE TECHNOLOGY CO., LIMITED (July 2, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID:2AW95LS0125051882A [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name)Ben Fu SPRING SUNSHINE TECHNOLOGY CO., LIMITED (July 2, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID:2AW95LS0125051882A [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name)Ben Fu

SPRING SUNSHINE TECHNOLOGY CO., LIMITED (July 2, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Smart Light Bulb / LS0125051882A / FCC ID: 2AW95LS0125051882A ) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: Ben Fu Title: manager

SPRING SUNSHINE TECHNOLOGY CO., LIMITED (July 2, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name: Ben Fu Title: manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 3 Model: LS0125051882A External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 3 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 3

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2AW95LS0125051882A Applied procedures / limit According to FCC §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz * = Plane-wave equivalent power density MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna,R=20cm Test Result of RF Exposure Evaluation BT+WIFI supported simultaneous transmission: BT+2.4GWIFI: ∑MPE Ratio =0.00026/1+0.00506/1=0.00532≤1, So passed. Modes& Channel Freq. (MHz) Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW / cm2 ) Result BLE 1M GFSK & MCH 1±1 2 1.5849 0.8091 (-0.92dBi) 0.00026 1 Pass BLE 2M GFSK & MCH 1±1 2 1.5849 0.8091 (-0.92dBi) 0.00026 1 Pass 2.4G WIFI 802.11n(H T40)& MCH 14±1 25 31.6228 0.8035 (-0.95dBi) 0.00506 1 Pass

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 43 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: Smart Light Bulb FCC ID: 2AW 95LS0125051882A Trademark(s): Linkind Model/Type reference: LS0125051886A Applicant’s name: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404, 24/F., Fu Fai Commercial Centre 27 Hillier Street, Sheung Wan, Hong Kong Manufacturer: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404, 24/F., Fu Fai Commercial Centre 27 Hillier Street, Sheung Wan, Hong Kong Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Dec. 04, 2025 Sample tested Date: Dec. 04, 2025 to Mar. 03, 2026 Issue Date: Mar. 03, 2026 Report No.: CTB25120402810RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25120402810RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 43 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 7 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 8 5.1 Test Facility ...................................................................................................................................... 8 5.2 Test Instrument Used ....................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 11 6.1 Block Diagram Of Test Setup ......................................................................................................... 11 6.2 Limit ................................................................................................................................................ 11 6.3 Test procedure ............................................................................................................................... 11 6.4 Test Result ..................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................. 15 7.1 Block Diagram Of Test Setup ......................................................................................................... 15 7.2 Limit ................................................................................................................................................ 15 7.3 Test procedure ............................................................................................................................... 16 7.4 Test Result ..................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 24 8.1 Block Diagram Of Test Setup ......................................................................................................... 24 8.2 Limit ................................................................................................................................................ 24 8.3 Test procedure ............................................................................................................................... 24 8. 4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ....................................................................................…

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Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 64 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: Smart Light Bulb FCC ID: 2AW95LS0125051882A Trademark(s): Linkind Model/Type reference: LS0125051886A Applicant’s name: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404, 24/F., Fu Fai Commercial Centre 27 Hillier Street, Sheung Wan, Hong Kong Manufacturer: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404, 24/F., Fu Fai Commercial Centre 27 Hillier Street, Sheung Wan, Hong Kong Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Dec. 04, 2025 Sample tested Date: Dec. 04, 2025 to Mar. 03, 2026 Issue Date: Mar. 03, 2026 Report No.: CTB25120402810RF02 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is WIFI-2.4GHz band radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25120402810RF02 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 64 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................................ 4 2. TEST SUMMARY .......................................................................................................................................... 5 3. MEASUREMENT UNCERTAINTY............................................................................................................. 6 4. PRODUCT INFORMATION AND TEST SETUP ..................................................................................... 7 4.1 Product Information .................................................................................................................................................... 7 4.2 Test Setup Configuration .......................................................................................................................................... 7 4.3 Support Equipment ..................................................................................................................................................... 7 4.4 Channel List .................................................................................................................................................................. 8 4.5 Test Mode ...................................................................................................................................................................... 8 4.6 Test Environment ........................................................................................................................................................ 8 5. TEST FACILITY AND TEST INSTRUMENT USED ................................................................................ 9 5.1 Test Facility ................................................................................................................................................................... 9 5.2 Test Instrument Used ................................................................................................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION .......................................................................................... 12 6.1 Block Diagram Of Test Setup ................................................................................................................................ 12 6.2 Limit ............................................................................................................................................................................... 12 6.3 Test procedure ........................................................................................................................................................... 12 6.4 Test Result .................................................................................................................................................................. 14 7. RADIATED SPURIOUS EMISSION ........................................................................................................ 16 7.1 Block Diagram Of Test Setup ................................................................................................................................ 16 7.2 Limit ............................................................................................................................................................................... 16 7.3 Test procedure ........................................................................................................................................................... 17 7.4 Test Result .................................................................................................................................................................. 18 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS..................................................... 40 8.1 Block Diagram Of Test Setup ................................................................................................................................ 40 8.2 Limit .......…

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www.leedarson.com ▏Better Life with Better IoT Innovation Rev. 1.0 Antenna Specification Antenna picture Antenna Type Internal Metal Monopole Antenna Antenna Peak Gain -0.82 dBi Operating Band 2400 MHz ~ 2483.5 MHz Test laboratory name and Address IoT Antenna Test Laboratory, 3 / A,LEEDARSON LIGHTING CO., LTD. Xingtai Industrial Park, Changtai Economic Development Zone, Zhangzhou, 363900, China Antenna Manufacturer LEEDARSON LIGHTING CO., LTD. Model name M071 B38 RGBTW项目 DUT photo Test Date 2025-11-03 Test Conductor Chen Meihua Antenna Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 1 OTA measurement Test System The SY-16 OTA system and RayZone2800 OTA system are anechoic chambers, which can measures antenna passive data such as antenna efficiency, antenna gain, and 2D&3D pattern. The systems are shown as follow: Figure 1 SY-16 OTA system Figure 2 RayZone2800 OTA system Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 2 Equipment List Table 1 Equipment List Used Equipment Manufacturer Model No. Serial No. Last Cal. Due Date ☒ Network Analyzer Keysight E5071C MY46527808 2025/1/9 2026/1/8 ☐ Network Analyzer Keysight E5071C MY46108051 2025/4/19 2026/4/18 ☒ Anechoic Chamber Sunyield SY-16 SI1727 2025/4/28 2026/4/27 ☐ Anechoic Chamber General Test System RayZone2800 CT10121244 B5079 2025/5/10 2026/5/9 Test Method Table 2 Test Method Name Antenna Performance Parameter Radiation Efficiency Test Method IEEE Standard Test Procedures for Antennas Standard No. ANSI/IEEE Std 149-2021 Test Software PMS-V2.8.5 ☒ MaxSign-V1.4.3 ☐ Test Result Efficiency and Gain Table 3 Antenna Efficiency and Gain Frequency (MHz) Gain (dBi) Efficiency (dB) Efficiency (%) 2400 -1.66 -8.13 15.37 2410 -1.61 -8.16 15.28 2420 -1.39 -7.93 16.10 2430 -1.39 -7.89 16.27 2440 -1.33 -7.81 16.57 2450 -1.11 -7.73 16.85 2460 -0.95 -7.58 17.46 2470 -1.04 -7.57 17.52 2480 -0.92 -7.46 17.95 2490 -0.84 -7.38 18.27 2500 -0.82 -7.34 18.47 Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 3 Radiation Pattern Table 4 Product coordinates Product Coordinates Table 5 3D radiation pattern 3D Radiation Pattern at 2450MHz X Z Y Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 4 Table 6 Radiation pattern in XY Plane 2D Radiation Pattern ( θ = 90°, XY Plane) Table 7 Radiation pattern in XZ Plane 2D Radiation Pattern ( φ = 0°, XZ Plane) Table 8 Radiation pattern in YZ Plane Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 5 2D Radiation Pattern ( φ = 90°, YZ Plane) LDZ-3 表单编号：LA-IPD-T001-6B 保存期限：永久 日期 变更理由 编号 3 设计 审核 制图 比例 涂敷 材料 产品 名称 ID 标准化 批准版本 单位 2 1 mm 线性公差 ±0.1 ±0.2 ±0.3 ±0.4 120 ~ 30030 ~ 1206 ~ 300.5 ~ 6尺寸范围300 ~ 1200 ±0.8 杨 玲 杨 玲 2022.12.30 2:1 V2.0 表一 林红滨 蒋洪奎 304不锈钢镀可焊镍 技术要求： 1、产品成型后不可有断裂、裂纹等不良，具体请参考IQC检验标准。 2、曲线按3D图加工，未标注尺寸参考3D及封样件。 3、未标注公差请参考表一。 4、标注序号的为重要制程管控尺寸，务必加工在公差范围内。 5、零件必须经过脱脂清洗去油处理。 6、成品不允许有毛刺等不良。 7、盐雾要求：中性盐雾48H。 8、产品镀可焊镍，需可焊锡。 9、产品外形不能有变形，翘曲等缺陷。 天线_8ZC-M350ST-W4G-01-P-03A 2022.12.30 2022.12.30 2022.12.30 21.1 32.5 29.5 20° 26 2.5±0.1 2.3±0.1 4.5 12.8 28.5 7.5±0.1 0.5 2.2 1.5 7.5 30.1 图号 2430800013 D1410013496 1 2 3 4 Ø1.00 +0 - 0 . 1 1

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: LS0125051882A Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions