No it's not a light like I've read in other reviews but it's an excellent source of heat. I use this light for my hermit crabs for warming. This helps keep the aquarium at a good temperature. My hermits are the pets in my preschool class. I was gifted a tank with a hood so instead of buying a whole heat lamp I use this bulb and a low heat tank heater and it keeps my hermit tank between 73 and 77.
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