When shopping for permanent LED lighting, most homeowners focus on color options, app features, and price per foot. But there's a spec buried in the technical details that has a bigger impact on long-term performance than almost anything else: system voltage.
JellyFish Lighting runs on 48 volts. Most competitors — including Trimlight, Gemstone, and nearly every other brand — run on 12 volts. That difference sounds minor, but it affects brightness, reliability, installation complexity, and energy efficiency in ways that matter for every DFW home.
Table of Contents
1. The Voltage Drop Problem
Every electrical wire has resistance. As current flows through that wire, some voltage is lost as heat — this is called voltage drop. The longer the wire run, the more voltage is lost, and the dimmer the LEDs at the far end become.
Here's the physics that matters: for the same amount of power, a 48V system carries one-quarter the current of a 12V system. Since voltage drop is proportional to current (V = I × R), a 48V system experiences roughly 75% less voltage drop on the same wire gauge and length.
For a typical DFW home with 150–250 linear feet of roofline, this is the difference between consistent end-to-end brightness and a visible fade from one corner of your house to the other.
2. Brightness Consistency Across Long Runs
On a 12V system, installers often need to add power injection points — additional wiring runs from the power supply to the middle or far end of the LED strip — to compensate for voltage drop. This adds complexity, cost, and potential failure points.
On a 48V system, a single power run can feed significantly longer LED strips without any visible dimming. For large DFW homes — especially two-story properties or homes with complex rooflines — this means:
- Even brightness from corner to corner without injection points
- Cleaner installation with fewer wires running across your attic
- Fewer potential failure points over the system's lifetime
3. Fewer Power Supplies, Cleaner Install
A 12V system driving 200+ feet of LEDs may require two or three power supplies to maintain adequate brightness. Each power supply needs an outlet, a mounting location, and wiring to the LED track. That means more hardware in your attic or garage, more connections that could loosen over time, and more points of failure.
A 48V system can typically cover the same footage with a single power supply. Less hardware means a simpler, more reliable installation — and less to go wrong a decade from now.
4. Energy Efficiency
Power lost in wiring is calculated by I²R (current squared times resistance). Since a 48V system uses one-quarter the current of a 12V system for the same power output, the wiring losses are reduced by a factor of 16.
In practical terms, this means more of the electricity you're paying for actually reaches the LEDs and becomes light, rather than being wasted as heat in the wiring. Over years of daily use, those efficiency gains add up on your electric bill.
5. Safety: Both Are Safe
A common concern: "Is 48V dangerous?" The answer is no. Both 12V and 48V DC are classified as Safety Extra-Low Voltage (SELV) and are well below the 50V AC threshold considered hazardous to touch. For context:
- 48V DC is the same voltage used in Power over Ethernet (PoE) networking cables running through every modern office building
- 48V DC powers telecom equipment and most electric bicycles
- You interact with 48V systems regularly without knowing it — and without any risk
The safety profile of 48V is identical to 12V for all practical purposes. The only difference is performance — where 48V wins decisively.
6. Which Brands Use Which Voltage
| Brand | Voltage | Max Run Length |
|---|---|---|
| JellyFish Lighting | 48V | Longest in class |
| Trimlight | 12V | Limited (injection needed) |
| Gemstone Lights | 12V | Limited (injection needed) |
| Oelo | 12V | Limited (injection needed) |
| EverLights | 12V | Limited (injection needed) |
JellyFish is the only major permanent lighting brand using a 48V architecture. This isn't a coincidence — 48V power distribution is the standard in commercial and industrial LED installations where reliability and long runs are non-negotiable. JellyFish brought that engineering philosophy to the residential market.
7. The Bottom Line
Voltage isn't a marketing gimmick — it's basic electrical engineering. A 48V system delivers more consistent brightness, fewer power supplies, lower wiring losses, and a cleaner installation than any 12V alternative. For DFW homes with substantial rooflines, the difference is both measurable and visible.
If you're investing in permanent lighting that should perform flawlessly for decades, the system voltage is one of the most important specs to get right. For a full side-by-side comparison, see our JellyFish vs Trimlight guide.
FAQ
Why does voltage matter for permanent LED lights?
Higher voltage means less current for the same power output, which reduces voltage drop over long runs. On a 12V system, LEDs at the far end of a 150+ foot run can appear noticeably dimmer. A 48V system delivers consistent brightness across the entire roofline without additional power injection points.
Is 48V dangerous compared to 12V?
No. Both 48V and 12V are classified as Safety Extra-Low Voltage (SELV) and are well below the 50V AC threshold considered hazardous. 48V DC is the same voltage used in PoE networking, telecom systems, and electric bicycles — it is safe to touch and does not pose a shock risk.
Which permanent light brands use 48V vs 12V?
JellyFish Lighting uses a 48V system. Trimlight, Gemstone, Oelo, EverLights, and most other permanent lighting brands use 12V. The 48V architecture is more common in commercial lighting, which is part of what makes JellyFish's engineering unique in the residential market.
Does 48V use more electricity than 12V?
No — 48V systems are typically more energy-efficient. Higher voltage with lower current means less power is lost as heat in the wiring. The actual LED consumption is similar, but 48V delivers power more efficiently across longer distances.