Review on UV Sensor Card - 2 Pack - Reptile Lamp UV Sensor Test Card for Bearded Dragons, Lizards, and Reptiles - UVB Fluorescent Lamp by April Daniels

I wanted to check my three UV lamps to see if they needed to be replaced. I usually change them every 6 months, but it's good to have these cards to check in advance if the bulb is going out. I suspected my tortoiseshell bulb was malfunctioning and the maps proved it. The old bulb barely registered on the UV spectrum, and the replacement bulb was just as high. A good, convenient and inexpensive way to test expensive light bulbs.