12V vs 24V LED Strip Lights
12V vs 24V LED strip lights: how voltage affects run length, power supplies, and what to buy for each room.
By Ethan Cole
Updated November 4, 2026
LED strips come in 12V and 24V versions, and a few are 5V USB. The difference is mostly about run length and power supplies. This guide helps you choose. See our product lists for 12V LED strip lights and 24V LED strip lights.
The Short Version
Pick 12V for short runs and simple kits, and 24V for long runs. A 24V strip carries half the current of a 12V strip of the same wattage, so it loses less brightness toward the far end. You must match the power supply to the strip’s voltage.
Side by Side
| Factor | 12V | 24V |
|---|---|---|
| Typical use | Cabinets, shelves, short room runs | Long runs, ceilings, perimeters, COB strips |
| Brightness at the far end | Can dim over long runs | Holds better over long runs, per makers |
| Power supply | 12V DC | 24V DC (do not use a 12V supply) |
| Kits | Many include a supply and dimmer | Often sold strip only; check the listing |
Listing Examples
- HitLights lists a maximum run of 33 ft on its 24V COB strip.
- KXZM warns not to use a supply higher than 12V on its 12V strip.
- NOVOSTELLA’s 24V strip is sold with a UL listed adapter and an RF remote, and PAUTIX’s 24V COB strip is UL Listed with an RF remote.
What to Check Before You Buy
- Voltage on the strip and on the supply
- Wattage: the supply should be rated above the strip’s total
- Whether the kit includes a supply, dimmer, or remote
- The maximum run length in the listing
Who Should Look Elsewhere
- Need only a short strip near a TV or desk? See USB LED strip lights, which run at 5V.
- Want a ready kit with a supply and remote? See LED strip lights with remote.
Frequently Asked Questions
Is 24V safer than 12V?
Both are low voltage. The supply plugs into mains power, so follow the manual.
Can I run a 12V strip on a 24V supply?
No. A mismatched supply can damage the strip.
Which is brighter?
Brightness depends on LED density and wattage, not voltage.
Safety note: low-voltage LED strips are safer to handle than mains wiring, but their power supplies plug into household power. Use the supply in your kit or one that matches the strip’s voltage and wattage, keep it dry, and follow the manual. Anything that connects to a household circuit should be done by a licensed electrician.
Related: how to power LED strip lights and how to connect LED strip lights.
Check current pricing and availability for the Onforu 16.4 ft Warm White LED Strip.
About the author
Ethan Cole leads research and editing at WikiHomeLED, comparing LED lighting for the home through manufacturer specs, manuals, safety listings and owner feedback. Every product is scored against the criteria on our How We Review page, and picks are updated when models change.