LED neon vs glass neon: how they work and which to choose

The difference in LED neon vs glass neon comes down to what makes the light. Glass neon is a sealed, hand-bent glass tube of gas that glows when a high-voltage transformer drives current through it. LED neon is a row of small LEDs inside a flexible silicone or plastic sleeve that blurs them into a continuous line. From across a room they can look alike; up close, and over years of ownership, they behave very differently.

This guide compares the two for someone buying a piece for their home, whether that is a sign, a wall piece or a neon-style frame such as the Lumi Frames Neon.

How glass neon works

A glass neon light is a gas-discharge lamp. Wikipedia’s article on neon lighting describes it as a sealed glass tube with a metal electrode at each end, filled with gas at low pressure, roughly 3 to 20 torr, which is a partial vacuum. When several thousand volts are applied across the electrodes, the gas ionizes and gives off colored light along the whole length of the tube.

That voltage comes from a neon-sign transformer, which steps ordinary mains power up to somewhere between 2 and 15 kilovolts, according to Wikipedia’s article on the transformer.

Every tube is made by hand. A bender heats glass tubing and shapes it into letters or lines, electrodes are fused onto the ends, the air is pumped out, impurities are driven off, and a small amount of gas is added before the tube is sealed. It is skilled work: Main Street America says about seven years of apprenticeship is generally needed to become an accomplished bender.

Color comes from the gas and the glass. Pure neon glows red-orange. Many other colors come from argon with a little mercury vapor, inside tubes coated with fluorescent phosphors. Wikipedia’s article on neon signs puts the choice at nearly 100 colors today. Each tube’s color is fixed when it is made.

How LED neon works

LED neon starts with an LED strip: a flexible circuit board lined with small surface-mount LEDs, usually running on 12 or 24 volts of direct current, as Wikipedia’s article on LED strip lights explains. The strip sits inside a channel of silicone or another plastic that diffuses the light, so you see one smooth line instead of a row of dots.

There are two common builds. In one, the LEDs face straight out through the diffuser. In the other, the strip is mounted on its side in the channel and the silicone turns the light 90 degrees, a design the same Wikipedia article describes. Standing the strip on edge lets the tube curve flat against a surface, the way neon lettering is drawn. Sellers label these builds with names such as “top-bend” and “side-bend,” but the terms are not used consistently, so check the product photos.

Because the light source is an ordinary LED strip, LED neon can do things glass cannot. A basic RGB strip changes the whole line to a new color at once. A multi-zone, or addressable, strip lets different stretches of the same tube light up in different colors at once, so light appears to travel along it. That is how the Lumi Frames Neon moves color around its border. Our explainer on color-changing picture frames covers how the zones are controlled.

LED neon vs glass neon, side by side

Look and color

Glass neon’s appeal is its glow. The gas lights up evenly along the whole tube and in every direction, so the line looks just as bright from the side as from the front, with a soft halo around it. Many people who love neon value that quality, along with the character of a hand-bent line.

Good LED neon comes close from the front. The diffuser hides the individual LEDs, and a well-made sleeve shows no dots at all. Many LED neon designs send their light out through one face of the sleeve (all-around versions exist), so from a sharp angle they tend to look flatter. Cheaper strips can also show faint bright spots where the LEDs sit.

On color, the two trade places. Glass neon’s color is set when the tube is made, while LED neon can be one fixed color or change on command. If you want one exact classic neon red, glass is the traditional choice. If you want a frame that shifts from warm white to a slow sunset gradient, only LED neon can do that.

Energy and heat

LED neon generally draws less power, but be careful with round numbers. LEDYi, an LED neon manufacturer, claims its LED neon flex generally uses no more than 15 watts per meter, and under 5 watts per meter at the low end, and puts glass neon at generally more than 20 watts per meter. Those are one manufacturer’s figures, and actual draw varies by product: Super Bright LEDs lists one 24-volt LED neon product at 4.3 watts per foot, or about 14 watts per meter. The honest way to compare is to check the wattage on the specific product, then run it through our LED energy cost calculator.

On heat, LED neon makers describe their products as low-heat. Even so, heat is what wears LEDs down: ENERGY STAR’s guide to LED lighting says thermal management generally decides how well an LED holds up over its life, so leave space around any LED piece and do not cover it. Glass neon is a “cold cathode” lamp, which means its electrodes are not heated by a separate filament the way an old-style bulb’s are.

Safety and breakage

The two carry different kinds of risk. Glass neon runs at thousands of volts, and Wikipedia’s article on neon-sign transformers warns that a shock from one can be lethal. A broken tube also means sharp glass, and tubes that use mercury can release it. LED neon runs at low voltage with no glass, so it is far more forgiving if it is knocked or dropped. Any mains-powered product still deserves care. Our LED frame safety guide covers lit frames specifically.

Durability, repairs and lifespan

Glass neon can last a long time, but it is not maintenance-free. Wikipedia’s article on conserving neon objects notes that the gases have limited lifespans, electrical parts degrade, and transformers last roughly ten to fifteen years. The upside is that glass neon can be repaired: a skilled bender can remake a broken tube, and the same article suggests going back to the original maker where possible. Finding one can be the hard part, since Main Street America notes that such craftspeople are scarce outside large metro areas.

LED neon is harder to break but harder to repair. When a section fails, you usually replace that section or the whole unit rather than fix it. Manufacturers rate LED neon in hours, commonly somewhere between 30,000 and 50,000: LEDYi’s neon flex page quotes figures of up to 30,000 and up to 50,000 hours, and Super Bright LEDs rates one product at up to 50,000 hours. Treat those as manufacturer claims. ENERGY STAR explains that LED “lifetime” usually means the point where light output has dropped by 30 percent, not the moment it goes dark. The Lumi Frames Neon uses a dense COB LED strip (1,344 LEDs per meter) on a low-voltage 24 V system.

Cost

Glass neon costs are driven by skilled labor. Each piece is bent, processed and filled by hand, and it has to be packed carefully to survive shipping. Main Street America describes neon as an artisan craft and LED as the cheaper alternative, and in practice custom glass neon usually costs more than an LED neon piece of a similar size. LED neon is made as a continuous strip and cut to length, which keeps costs down and makes it practical to build into products like frames.

Outdoor use

Glass neon has been used outdoors for more than a century. Wikipedia records Georges Claude showing neon tube lighting at the Paris Motor Show in 1910, and a large Cinzano sign lighting up the Paris night sky by 1913. Outdoor installations need transformers and housings made for the weather, fitted by a sign professional.

LED neon can work outdoors only if the product is rated for it. Some silicone LED neon carries an IP67 rating, and Super Bright LEDs describes its IP67 product as suited to outdoor or wet locations. Indoor decor pieces, frames included, do not necessarily carry such a rating. The Lumi Frames Neon listing does not include an outdoor rating, so treat it as an indoor piece.

Which should you choose?

Choose glass neon if:

• You want the classic all-around glow and a hand-made object.
• The piece will stay put, out of reach of kids, pets and elbows.
• You are happy to find a neon specialist for repairs.

Choose LED neon if:

• You want color that changes or flows.
• The piece will be moved, hung in a busy room or shipped.
• You care about low voltage, low weight and simple setup.

For a lit border around a print, or a frame that works as a piece of light on its own, LED neon is the practical choice. That is why the Lumi Frames Neon uses multi-zone LED neon tubes on a floating frame, made in sizes from a small 8 × 8 in square up to 24 × 36 in. If you are still working out what “neon frame” means in a shop listing, read the five things a neon frame can be. For backlit, edge-lit and halo designs, see our overview of illuminated frames.