Uvb output is fine but the light doesn't look natural. I'd recommend the Exo Terra UVB 150 26 watt 10.0 over this one. About 5 dollars more but the light looks much better and not so artificial. I mount one of these and an exo terra in the same double dome in the center back if a 120 gallon tank and my bearded dragons always prefer the exo terra side.

I saw some complaints that it doesn't last, well I haven't had it long enough, I think. I have had it for a couple weeks, I use it just during the day. I have a green anole lizard that snuck into my home somehow. She was living on one plant and kind of staying there. I was feeding her 2 small crickets per day. Very tiny lizard, the smallest one I saw since these things started appearing in my yard and around the house.

But she left the house at one point, then a few days later came in literally through my front door like a person, so I allowed it, and she found her way back upstairs to the same plant. But when she returned she wouldn't eat any crickets, and was acting super afraid of me, when before she had started eating the cricket right out of the tongs I held. I was worried bc she seemed to be getting even tinier. I read these lights could help with appetite. Since I have no cage I bought a simple lamp screw thing with an on/off switch and screwed this light into an outlet that just happens to be by the plant she was living on. After about a week she just ate two huge crickets, and I've been seeing her out more getting sun and hanging around the light.

I ordered this bulb and heat bulbs together, one of my heat bulbs went out already, but this uv bulb is still going! :)

Worked for a while for my bearded dragon

Worked as it should