Solarmeter Model 6.5R UV Index Meter Reptile Accessory, Green

I now can be certain of UVB output for both my dragon and my leopard gecko’s enclosures. I won’t need to swap out the lights based on time used, and instead can be certain of when the output begins to diminish.

This thing is amazing, and essential if you are a reptile keeper. Based on the recommendations/settings of my aquatic turtle's UVB lamp/bulbs, and with replacing the bulb every 6 months, he should have been receiving adequate UVB, but after purchasing this I discovered that he in fact was not. I had to change his bulb to the Desert series and now he's getting exactly what he needs. I recommend looking up your reptile's Ferguson zone to see what the UVI recommendation is, then using this Solarmeter, you'll be able to ensure they're receiving the proper amount of UVB. Considering how sick reptiles can become without adequate/appropriate lighting, this Solarmeter is 100% worth the price.