I use the halogen indoor/outdoor floodlights by GE. I have found personally that I get better concentrated heat and they use a fraction of the wattage I needed with a regular bulb. My tanks have a lot of air circulation, so I had to use 250 watts with a household bulb to get the right temps, and I only need 60-75 watts with the floodlight. That kind of thing will vary depending on the enclosure, I think.
Really, any heat bulb is fine as long as it's creating the proper temps. Maybe you shouldn't be blaming the bulb, but looking at the temp guages. If you are using a strip thermometer or guage that sticks to the glass, like what you find at pet stores, those can be off by up to 20 degrees. A digital thermometer or temp gun is far more accurate, and allows you to measure the temp at the basking spot and cool spots, rather than only at the side of the cage.
And of course like Brandon said, make sure all your other husbandry techniques are in check as well... UVB, supplements, hydration, etc.
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Amanda
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2.0 bearded dragons (Ocho / Domo-kun)

0.1 kingsnake (Rio)
0.0.1 tarantula (Otto)
1.0 ferret (Playstation)
1.0 cat (Wally)
0.1 dog (Tima)