another newbie question regarding heat lamps

[chipmunkskink]

Hi everyone, just about to set up our 40 gallon terrarium for a new baby BTS and I was wondering if a 7 inch diameter heat lamp is good enough or do I need to get a 10 inch wide heat lamp? I also understand that a 100 watt bulb is sufficient...is this correct? thanks again for the input...

[StaceyLeigh]

100 watt may be ok in the winter, probably too much in the summer. Get a Temp gun so you can check the temps regularly. Temps on the basking rock during the day need to be 95-100 degrees F. I have used 7" and 10 ", both work. Check the 7" light and see if it will take the 100 watt, mine will only safely handle up to 75 watts.

[chipmunkskink]

thanks for the info I ended up getting a used 7" that can take up to 150 watts