GREENICUV LED Black Light Bar: 10W 1ft USB Portable T5 Purple UV Black Light Lamp for Glow in The Dark for Body Paint, Bedroom Decor, Parties, Stain Detector, Halloween 1 Pack

These UV black lights are hands down the best for making the glow in the dark stars shine. I stuck hundreds of stars to the ceiling in both the bedrooms ( which took hours) and was really disappointed that they hardly had any glow. So I purchased two UV lights, wow!!! Amazing, one light really lights the whole ceilng, and charges the stars up, so even when you switch the UV light off the stars still hold their charge for a while. I also did some spay paint stenciling with neon paint ( autobot logos) it looked great under the UV really made the under layer pop. Unfortunately the UV didn't have the strength to do the whole wall, just a 2ft x 2ft area. I don't know why it was so effective on the stars and not with the paint. But still a really good investment if you like looking at a starry night in bed.

I don't think the item was particularly cheap to buy but the product is certainly poor quality.

The cable connector into the light is not tight and kept popping out

Easy to set up and good value

Used to two of these to do retrobriting on keyboard keys. They are fairly low power so it does take 3-4 days but the results were good.