Top critical review
7 people found this helpful
Good for heating enclosed space, not so much basking spot.
on February 24, 2013
I'm a bit disappointed with this product. First, because of poor manufacturing quality control, or manufacturer packaging the first two that I received had damaged threads (thread end bent to one side, threads smashed together on one side, spread apart on opposite side) and would not thread into a fixture. Fortunately Amazon's returns are painless, and with prime shipping the entire process of going from first bulb to third bulb only took a few days.
Once I finally had a functioning product, I was simply disappointed to find it really doesn't "emit" all that much heat outward from the bottom surface. Lots of heat rises off of it, but to get a basking spot up to 90-95 I had to position the bulb a mere 4 inches above the spot, which doesn't work with the wire cage type fixture I have around the bulb, our tortoise wouldn't fit under with any sort of reasonable or safe clearance between him and the bulb. Maybe it works better in a dome type fixture, then you just have the issue of heat building up in the dome, which seems less safe and likely it would shorten the life of both bulb and fixture.
Overall, puts off plenty of heat, just doesn't project straight from the flat surface, but could heat an enclosed space well, just not a great basking type lamp.
Edit: I've read more about these types of bulbs and how they are supposed to work. It seems they supposedly emit long infrared waves that are absorbed by objects, causing the objects themselves to warm up, and despite recommendations to use with an open cage type fixture, actually benefit from having a reflector dome to bounce the waves back down. I'm not sure how you're supposed to accurately temp how much warmth is coming from the bulb as it heats different types of materials differently, may be good to have a flat rock or something beneath it that'll absorb the waves well and give an indication of temp at adjustable distance, though how close that will be to how much your reptile absorbs is hard to determine. Ours is still in an open cage fixture, and it doesn't feel like it heats the air or substrate beneath it very much, but our tortoise does spend a good amount of time under it, so apparently he feels the difference. Supposedly a 100W bulb emits the infrared 10" beneath it.