I realize that the previous post is old. But, I just thought I'd chime in.

I have had bad experiences with the T-Rex bulbs. I recommend the Zoomed Reptisun bulbs. They are essentially the same thing, i.e. self ballasted mercury vapor bulbs. But, I have found their quality and durability to be far superior. LLLReptile and ReptileSupply.com have the 100 "watters" for less than $40, at last check.

At an ambient temperature of 75 degrees F, I am getting a basking spot of around 95 degrees F at a height of 14 inches. That is identical in 6 indoor, both aquatic and terrestrial, setups.

I hope this is helpful.

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