I. LED Lighting Power Application Overview

II. LED Strip / Tape Power Supply Applications

LED strips are the mainstream product for indoor decorative lighting, requiring high stability of constant‑voltage output. 24V strips offer longer transmission distance and lower line loss compared to 12V strips.

2.1 Indoor Decorative Strips

Selection reference: strip length (m) × power per meter (W/m) ÷ voltage = required current; recommend 20% margin. 24V strips can transmit up to 20‑30 meters, while 12V strips should be kept within 10 meters.

2.2 Cabinet / Display Case Strips

Applicable scenarios: kitchen cabinets, wardrobes, wine cabinets, display cases, vanity mirrors

III. Commercial Lighting Power Applications

3.1 Downlights and Spotlights

3.2 Panel Lights and Troffer Lights

Applicable scenarios: offices, shopping malls, supermarkets, hotels, hospitals, schools

IV. Residential Lighting Power Applications

4.1 Ceiling Lights

4.2 Desk Lamps and Floor Lamps

Applicable scenarios: living rooms, bedrooms, studies, children's rooms

V. Display Lighting Power Applications

Applicable scenarios: jewelry stores, museums, retail showcases, supermarket freezers, retail shelving

VI. Plant Lighting Power Applications

Applicable scenarios: indoor cultivation, greenhouses, home gardening, aquariums

VII. Power Supply Specification Quick Reference

VIII. Power Supply Selection Reference for Different Scenarios

IX. Product Form Description

X. Certification Information

For LED lighting products exported to different countries, the power adapter must have the corresponding certifications. Below are some of the certifications; please contact us for more details.

XI. Frequently Asked Questions 

Q1: What is the difference between constant‑voltage and constant‑current LED lighting power adapters? 

A: A constant‑voltage power supply maintains a fixed output voltage while the current varies with the load, suitable for parallel loads such as LED strips and tapes. A constant‑current power supply maintains a fixed output current while the voltage varies with the load, suitable for luminaires with high‑power LED chips in series. Keyulong can provide constant‑voltage, constant‑current, and combined constant‑voltage/constant‑current solutions. 

Q2: How to choose the appropriate power supply for LED strips? 

 A: Calculation formula: Power supply power ≥ total strip power × 1.2 (20% margin). Total strip power = strip length (m) × power per meter (W/m). For example, a 10m strip at 8W/m has a total power of 80W, so a power supply of 100W or above is recommended. 

 Q3: What certifications are required for LED lighting power adapters?

 A: CCC certification is required for domestic sales in China; CE is required for export to the EU; UL/FCC for the US; UKCA for the UK. Keyulong's full range of products is certified with CCC, CE, UL, FCC, UKCA, PSE and many other national standards, meeting various export requirements. 

 Q4: How to choose between 12V and 24V LED strip power supplies?

 A: For short distances (within 10m), 12V is sufficient; for longer distances (20‑30m), 24V is recommended for lower line loss and more uniform brightness. Keyulong offers full‑range LED lighting power supplies in 12V and 24V, covering 5W to 120W. 

 Q5: Can LED power adapters be customized?

 A: Yes. Keyulong supports full‑dimension customization including output voltage, current, power, plug type, cable length, connector type, etc. MOQ for custom orders is 1000 pieces, delivery 15‑20 days, and standard samples can be shipped within 24 hours.