What wattage lightbulb should I use?

[jasonm96]

For the time being I'd use the 50w again and save up some and then get a ceramic or heat mat aswell as a thermostat. I am surprised the 50w doesn't keep the temps right

[jamien]

Should I use the regular bulb or the one that is flat on the bottom? I heard the one that is flat on the bottom gives off more heat.

Oh and which heat lamp should I use? The large or small? I read that the large heat lamp will give off more heat in a larger area.