200PCS Glow Stones Pebbles, Gardening Luminous Glow Stones Rocks Outdoor Decor Glowing Water Fish Tank Gravel (White in Daytime, Blue in The Dark)

I haven’t tested how long the glow lasts, but it’s exactly what I was looking for, especially with the sale price of $4.

I have 100% FULL SUNSHINE COVERAGE FROM 7AM TILL AT LEAST 7PM. THESE DO NOT GLOW, THEY WERE PLACED IN AREA WHERE IT'S 100% PITCH BLACK BY 10PM. THEY DO NOT GLOW! I HAVE THEM PLACED SPREAD OUT IN MY YARD WHERE THERE IS A RING CAM TO BACK UP REVIEW.HOWEVER, AMAZON IS ONLY WILLING TO GIVE MONEY BACK, IF I ROUND UP 200 PIECES THAT CAN NOT EVEN FILL A 5OZ CUP, EXTREMELY SMALL & CAN'T HARDLY SEE IN THE DAY, AND RETURN THEM..DO NOT BUY, SOULD BE SOLD AT A 1.00$ STORE

I just received these today. They are not even as big as a penny although they do look like they will glow very well. It said that there were 400 pieces in there so I only ordered one, but there are 400 very small pieces. I didn’t have much to cover, but one little pouch of 400 of them didn’t even do it. I’ll have to buy some more, it does look like they will glow that was the light that made it glow like that. It will be interesting to see what it looks like tonight after sun all day. I will update then. But now that you’re wanting them for any area to make a difference, no matter what the size you’re going to need multiple packages.

It's one bag of 100, most of them float and the glow is not bright

Actually use these in my fish tank which don't get recharged so much with light but I have a black light in there so they glow all the time I love them great decoration

These rocks do glow, but they require a bright lighting source for some time. I held mine under a light and only some started to glow. I bought them for an indoor fish fountain, the fountain holds about 10 gl. Of water. The rocks did not works for me, the light is so dim I cannot see them. But it's nice to have something at the bottom of the fountain.

Such a small quantity and size for the price. Would have to have 1000 bags of these rocks to achieve the landscaping suggestion in the photos. My husband laughed when I showed him the size of the rocks in the bag. Very disappointing.

Glow nice blue color under black/blue light.