Common Questions

After a full charge in direct light, a Luma Collar glows for hours — bright at first, then settling into a softer steady green. You'll see it best in real darkness; under a streetlight or porch light it looks dimmer than it is.Charge it right before dark for the longest, brightest glow.

It depends on the walk. Fresh from direct sunlight, the collar is easy to see in the yard at dusk or around a campsite. But it's a soft, close-range glow, not a long-distance light, and it won't make your dog visible to drivers. For roadside walks, add an LED light or reflective gear.Where LUMA Collars do their best work is indoors: showing you where your dog is in a dark house, without turning on a light.

Usually one of two things.It needs a stronger charge. Direct sunlight or a bright lamp held close gives the brightest glow. Room light alone charges it more gently — enough to spot your dog in a dark house, but not its brightest.It's working as designed. The glow is brightest in the first several minutes, then settles into a softer steady green that lasts for hours. That fade is normal for photoluminescent material, not a fault. The collar is built to show you where your dog is in the dark — not to light up the yard.You'll also see it best in true darkness. Under a streetlight or porch light it looks dimmer than it is.

Yes, the glow-in-the-dark dog collar is adjustable for a more comfortable fit.

Luma Collars feature 304 stainless steel metal D-ring and plastic buckles/strap keepers.

Luma Collars are made with a strontium aluminate phosphor — the same class of long-glow pigment used in premium safety gear. It absorbs light during the day and releases it slowly after dark, so your dog stays visible without any electronics.

Just expose it to light. A few minutes of sunlight or bright indoor light powers it up — no plug, no charger, no waiting by an outlet. The brighter the light and the longer the exposure, the stronger and longer the glow.

Yes. Daylight charges it even when it's overcast, and ordinary indoor lighting works too. A sunny day gives the strongest glow, but you're never dependent on it.

Never. No batteries · No cables · Recharges in any light. There's nothing to plug in, replace, or throw away.

The glow pigment is non-toxic and non-radioactive — it works purely by absorbing and re-emitting light. The collar is built from durable PVC-coated webbing designed for everyday wear.

Measure your dog's neck with a soft tape, then add room for two fingers. Small fits 25–36 cm (10–14"), Medium fits 34–48 cm (13.5–19"), and Large fits 46–61 cm (18–24"). All sizes are 25 mm wide with an adjustable slider for a precise fit.

Yes. The PVC coating shrugs off rain, splashes, and the occasional swim, so everyday adventures won't dull the glow.

We're launching in our signature glow green — the brightest, most visible color after dark. More colors are on the way.

Wipe it down with a damp cloth and mild soap, then let it air dry. Avoid harsh solvents, which can degrade the coating over time.

No. The phosphor doesn't "run out" — it recharges every time it sees light and will keep glowing for the life of the collar.

LUMA Collars are glow-in-the-dark dog collars with a soft green glow that shows you where your dog is in a dark house, so you can step around them on a late-night trip down the hall. They charge in light, with no batteries or cables.