Luminous Tape, Proboths 1 Roll Removable 16 ft Length X 1.2 in Width Safety Photoluminescent Home Decor Tape Glow in The Darkness Sticker

One of the basic questions about this category of product is "How long does it glow?" but many of the answers I found were not helpful except for ones reported as being short duration.I set up an experiment, using an unlit (dark) room at the end of an unlit hallway, but with some light going down that hallway that dimly lit a portion of the room. The tape was placed in corner of the room that didn't receive this light directly. My intention was to simulate what I viewed as the most common situation.The tape had been left for 4 hours in a brightly lit room, either diffuse light from a window (not sunlight) or from the normal artificial lighting in a office-type setting. The 4 hours sitting in the light (recharging) was arbitrarily chosen. Shorter times seem to produce equivalent results for up to 4 hours, but I didn't get around to the longer observations.Since I didn't have a meter, my measure of brightness was to place it next to a cardboard box with a high gloss white finish. This box was decidedly visible in very low light situations (it reflected light well).Observation was from about 6 feet away without allowing eyes to adjust to the darkness (I came from a well-lit room). Again, this was chosen to represent my most common situation.0 hours: tape is significantly brighter than the box.3 hours: In near full darkness (I shut the door to the room), it is very bright. In slightly less darkness, it has roughly the same brightness as the glossy box -- both are readily seen. Both stand out strongly from the background which is a bookcase full of books with the usual assortment of covers.4, 5 & 6 hours: Still very visible, but doesn't register as quickly when I walk into the room.8 hours: Dim, bur easily spotted when I look toward it (at 6 feet).10 hours: Doesn't register as glowing. It registers as the same as light coming off a shiny object in that room.The length of tape used matters: The above results are for a 6-inch long piece of tape. For a 2-inch long segment, 5 hours was about the limit of my detecting it at 6 feet. YMMV: my eyes are 65 years old.Note: This tape does NOT stand out in merely low-light situations because the ambient light overwhelms the luminous output -- it is simply a dull yellow-green and easy to miss. However, this threshold is a level of light where I wouldn't need this tape. Instead, this is a circumstance where you should use reflective tape. If the circumstances vary from low-light to darker, you may want use a combination of reflective tape and this tape.Realize that the light charges only the portions of the tape that it hits. For example, I wrapped the tape around a flashlight and the side that had been facing out into the room was very bright, but the side facing the wall started out as dim.-- Douglas B. Moran

Low light glow at night in bedroom that doesn't recharge as well as if it was under the sun. We us small pieces to avoid kicking furniture or to find restroom in middle of night. The glow is enough to find our way

Used it for a offroading nite time trip worked great

Wow, This tape is Amazing. I made a mistake and tried to take it off and it was hard to(this is a good sign). I have a portable blue light so I can charge my bike anytime with a good bright glo. Im buying a second tape because it was not enough to cover my whole bike. Fast shipping too

Work great and exactly what I expected. I am very happy and have purchased this more than once. The glow last for a very long time and not to difficult to remove.

I charged this tape in sunlight for two days and it still did not glow, it's just regular tape.

Definitely needs some good sunlight to really pop but it always impresses. I put lettering on a guitar cans grill cloth for a cool effect

The glow lasts longer (4-6 hrs.) than any other glow stuff that I've ever seen or used.