I disagree. If you have a good tstat it should work a bulb or CHE just fine. I have had to issue with doing it. The most important part in doing so is the placement of the probe and the type of bulb being used. Spot vs. Flood. It is also equally important you set the tstat up correctly to work with the heating equipment you are using.
OP, I have four Herpstats so I think you can figure out my vote. A Herpstat2 will control a lamp and uth great.