Q: What size batteries does it use and how many?
A: 3AAA batteries
Q: Will the light work with natural light, or do you need to do it at night?
A: Will work in natural light although the effect is subtle. Darkening the room even a little, turning off lights and/or closing curtains or blinds helps significantly, the darker the better.
Q: Do you need to wear eye protection when using this UV Light?
A: You can if you want. It‘s not a good idea to shine the light straight into your eyes or anyone else‘s eyes. The UV light works very well in the dark without needing eye protection.
Q: Does this work on concrete?
A: It worked for me. However, you must make sure it is dark. "Blacklight" usually only works in the dark.
Q: What Are The Benefits Of Using This Product?
A: We had terrific damage from a dog urination etc at a rental and wanted to see if we got the slab clean. It will show discoloration spots and stains at night on the carpet also so you know where to deep clean.