Short answer: modern LED neon signs are low-risk when they are properly manufactured, installed and used — but they are still electrical products, and "neon sign" now covers two very different things. Most signs sold today are LED neon: a flexible silicone tube on an acrylic backing, running on 12V DC from a wall adapter. Traditional glass neon is a hand-bent gas-filled tube driven by a transformer at thousands of volts. Almost every safety warning you've read about neon belongs to the second kind. Here's an honest breakdown of both.
Where the Real Risks Actually Are
| Safety factor | LED Neon (Voltleds) | Traditional Glass Neon |
|---|---|---|
| Operating voltage | 12V DC at the sign — very low shock risk in normal use | 3,000–15,000V — capable of a serious shock |
| Surface temperature | Normally only slightly warm | Tube runs hot; electrode ends hotter still |
| Gas inside | None | Neon or argon; some tubes also contain mercury |
| If it's knocked | Silicone tubing flexes rather than shattering | Glass can shatter and release its gas |
| Fire risk | Low, but not zero — it's still an electrical product | Low, though the transformer is a genuine ignition point |
| Around kids and pets | Generally suitable when securely mounted and cables kept out of reach | Not recommended within reach |
Note that the low voltage figure describes the sign itself. The power adapter still plugs into 120V household current, so the cable and adapter deserve the same care you'd give any other appliance.
Do Neon Signs Get Hot?
LED neon gets warm, not hot. Put your hand on a properly working sign after it has been running for several hours and the tubing should normally feel only slightly warm. The LEDs are low-wattage and distributed along the whole length of the tube — roughly 8 watts per meter in a Voltleds sign — so there's no concentrated hot spot the way there is with a filament or halogen bulb.
The power adapter runs warmer than the sign does, and some warmth there is expected: converting 120V AC down to 12V DC sheds a little heat. What matters is the difference between warm and abnormal. Unplug the sign and inspect or replace the adapter if it becomes unusually hot to hold, smells of hot plastic, shows discoloration or scorching, cuts out repeatedly, or makes unusual noise.
Glass neon is a different case. The tube itself gets noticeably hot in operation and the electrode ends run hotter than the rest, which is why glass signs are mounted out of reach with clearance from anything flammable.
Can a Neon Sign Cause a Fire?
A properly designed LED neon sign has a low fire risk, but it is still an electrical product and the risk isn't zero. In practice, problems are far more likely to come from damaged wiring, an unsuitable adapter, poor ventilation or careless installation than from the LED tubing itself. The four things actually worth checking:
- Damaged or pinched cable. A cord run under a rug, crushed behind furniture or chewed by a pet can short. Route cables where nothing rests on them.
- A cheap or mismatched adapter. An underrated adapter runs hot under load. Use the adapter supplied with the sign — every Voltleds sign ships with a UL-certified adapter — and match voltage and amperage exactly if you ever replace it.
- No ventilation around the adapter. Don't bury it under a cushion, seal it in a closed cabinet, or leave it wrapped in its own coiled cable.
- Overloaded outlets. A sign draws very little, but a chain of cheap splitters is a hazard regardless of what's plugged into it.
Do Neon Signs Use a Lot of Electricity?
No — an LED neon sign is one of the cheapest things in a house to run. Voltleds tubing draws roughly 8 watts per meter, so a typical home sign lands somewhere between 8 and 25 watts total, less than a single old-style incandescent bulb.
| Power draw | Approx. tubing length | 6 hrs/day for a year | Running 24/7 for a year |
|---|---|---|---|
| 8W | ~1 meter | about $3 | about $13 |
| 16W | ~2 meters | about $6 | about $25 |
| 24W | ~3 meters | about $9 | about $38 |
Estimates use roughly 18¢ per kWh, close to the current US residential average. Actual power use depends on the total length of LED tubing in the design, not on the sign's outside dimensions — an intricate 24-inch graphic can contain more tubing than a simple 40-inch word.
Traditional glass neon generally uses more electricity than a comparable LED sign, though the exact difference depends on tube length and diameter, color, transformer loading and how the sign is built. Running cost is one of the main reasons commercial buyers moved to LED.
Are Neon Signs Safe in a Bedroom or Kid's Room?
LED neon is generally well suited to bedrooms and kids' rooms, because it uses low-voltage LED lighting and flexible silicone tubing rather than fragile glass at high voltage. That's a large part of why it replaced glass in home décor.
Two things still matter. Mount the sign securely through the pre-drilled holes rather than leaning it on a shelf — our neon sign hanging guide walks through both mounting methods. And keep the cable and adapter out of reach of young children and pets. The tubing flexes rather than shattering if the sign is knocked, but the acrylic backing can still crack, and a falling sign of any kind can cause injury.
If your question is about brightness and eye comfort rather than physical safety, we covered that separately in our guide to RGB and neon lighting and your eyes.
Is There Gas or Mercury Inside?
Not in an LED neon sign. There's no gas to leak and no mercury — the tube is solid silicone around an LED strip. You can see how the two are built differently in how neon signs are made.
Glass neon does contain gas. Pure neon produces the classic red-orange glow; other colors come from different gases and phosphor coatings, and some traditional tubes — particularly argon-based phosphor tubes — may also contain a small amount of mercury. That's why the standard advice for a shattered glass tube is to ventilate the room, avoid vacuuming the debris, sweep it up with stiff cardboard rather than by hand, and seal it in a container for proper disposal. It's a real reason to prefer LED anywhere near children, pets or foot traffic.
Can You Leave an LED Neon Sign On Overnight?
Generally yes. Voltleds signs use a UL-certified adapter and are built for extended operation — plenty of bars and shop windows run theirs continuously — but follow the instructions supplied with your sign, keep the adapter undamaged and ventilated, and unplug the sign if it flickers, buzzes, smells unusual or becomes excessively hot.
The other consideration is lifespan rather than safety. Voltleds tubing is rated for 50,000 hours, and running a sign 24/7 accumulates those hours several times faster than evening-only use. A simple timer plug reduces unnecessary operating hours; we break the math down in how long neon signs last.
A Quick Safety Check Before You Hang It
- Inspect the cable and adapter for cuts, kinks or crushed sections before first use.
- Use the supplied adapter, and match voltage and amperage exactly if you replace it.
- Mount the sign with the included hardware rather than propping it against something.
- Leave the adapter in open air, not buried under fabric or sealed in a cabinet.
- Give the sign clearance from curtains and anything that traps heat.
- Use only a sign rated by the manufacturer for the conditions where it's installed — tubing, connections and adapter all have to suit the environment. Voltleds offers both waterproof and non-waterproof builds; check which one you have before putting a sign outdoors or in a bathroom.
- Never connect a low-voltage sign to a wall dimmer intended for household bulbs.
- Unplug before cleaning, and wipe with a dry microfiber cloth only.
Frequently Asked Questions
Can you touch an LED neon sign while it's on?
On a properly working sign, yes. It runs at 12V and the tubing normally stays close to room temperature, so brief contact while lit is not a concern. Handle it by the acrylic backing rather than the tube — that's about protecting the sign rather than you.
Are neon signs a fire hazard?
A well-made LED neon sign presents a low fire risk when the cable and adapter are undamaged and have room to ventilate, though no electrical product is entirely risk-free. Glass neon carries somewhat higher risk because of its high-voltage transformer, which is why commercial glass installations are wired by professionals.
Do neon signs make noise?
LED neon tubing itself operates silently. Audible buzzing from the adapter, a dimmer or a controller can indicate a power-supply, connection or control problem — unplug the sign and inspect the power components before continuing to use it. A faint hum is normal in glass neon, where it comes from the transformer.
Are neon signs safe to leave unattended?
A securely mounted LED sign with an undamaged cable and adapter is generally fine to leave running while you're out or asleep. Treat it as you would any appliance: if it flickers, buzzes, smells unusual or the adapter becomes excessively hot, unplug it and check the power components first.
What happens if an LED neon sign breaks?
Unlike traditional glass neon, an LED sign contains no pressurized gas and no mercury-filled glass tube. It does contain an LED strip, copper conductors, solder joints and an acrylic backing that can crack into sharp edges, so if the tubing or backing is damaged, unplug the sign and stop using it until the wiring and power system have been checked.
Are LED neon signs safe for pets?
Generally, with the same two conditions as with children: mount it out of reach and manage the cable. The tubing is cool in normal operation and shatter-resistant, but a dangling cord is a temptation for a curious dog or cat. Clip it along the wall or run it behind furniture.
Built Around the Safer Design
Every Voltleds sign is 12V LED neon — silicone tubing on 6mm acrylic, shipped with a UL-certified adapter and hanging kit. No gas, no fragile glass tubing, and no high-voltage neon transformer. Browse signs for the bar, bedroom, game room or man cave, or design your own custom neon sign in any text, font and color.