Good product, would recomend
This light worked great, I had bought another cheap light after Halloween a few years ago for this purpose but was never happy. This light does all you expect. It does take a lot of batteries and is somewhat clumsy to hold. I would still recommend it to others with pee proplem areas.

You have to look hard, but it does work
My sheltie had 3 accidents within a 2 week period this last spring... we don't know why, but she hasn't done it since, so we think she might not have been feeling well. In any case, I had some carpet to clean with an enzymatic cleaner, and while I knew the general area, I couldn't remember exactly where Zoey had gone pee.

You have to use this detector in a pitch dark room.... I think most UV lights have this limitation, even for the professionals. At our old house, we had a pro carpet cleaner come in and treat pet stains, and they could only do this at night with their UV detector, so the cleaners were over late at night to detect and treat.

When I used the Simple Solution Spotter, the urine showed up as very pale, dull yellow spots on my dark thick brown carpet. Zoey has a habit of starting to walk away before she's fully finished peeing, so there were little trailing drips I had to track down - this was the hardest part of treating the stains. Other than having to be on my hands and knees, staring hard at the carpet, it was easy enough to start at one area, and work my way backwards until I'd found all 3 spots she'd made.

I'm glad I bought the Simple Solution UV Urine Detector even though I've only had occasion to use it once, and amazon had a lower price than my local pet supply store.

Not that this has to do with the detector itself, but I found it helpful to use a manual pressure sprayer while treating the stains. I found mine in the garden supply area of a hardware store. Mine's larger than regular trigger spray bottles, and you can tilt it forward and downward to spray the carpet - something that's hard to do with a trigger spray bottle, as liquid would move away from the straw part of the trigger bottle, and nothing would come out. This wasn't a problem with the manual pressure sprayer... I'd fill it, pump it to build pressure, and I'd have plenty of stain treater to do the entire area. This way, I didn't have to stop to refill the bottle, coming back to the carpet and trying to find where I left off. Hope this tip helps!

Completely Ineffective
Even after knowing exactly where my cat uninated this product did not even faintly illuminate the stain. I can't understand the other reviewers of this item giving this product anything but a big zero. I sent it back promptly for a refund. I hate a ripoff. I would have given it a minus 5 if that had been possible. I irks me even to give it one star

Healing the Whole Man Handbook: Effective Prayer for the Body, Soul, And Spirit
A whole body healing handbook that helps me pray more effectively for others. Highly recommend this for all who have a healing need of any kind in their life.

Not a strong UV light, not particularly useful
Light shows only when completely dark. Not necessary urine stains, mainly anything white will glow. So white residue from water stains will glow also. Not very useful.