I had purchased a heat lamp to keep the ambient temperature in my tank up, but it burnt out pretty fast and the temps are too low. I have a heat pad that keeps her basking temp at about 90-95°, but the rest of it has dropped to about 68°. I would like some suggestions on quality bulbs to keep the temperature up in a 20 long tank. I have a fluker's fixture that says it can handle up to 75 w. It will be placed about 6.5 inches from the rim of the fixture to the top if the lid. Until I get this I have another heat mat that has been able to get it a bit warmer, but it still is less than 70 in some places, so I'd like a new bulb that will last and heat well as soon as possible. Thanks in advance.