Quote Originally Posted by tkamiya View Post
If you are using 75 watts bulb, you shouldn't be having that problem in the first place.... What are the symptoms you are experiencing? Do you not get a reasonable exposure time with lens stopped down to say, f/8 or so?
It's 75 watts. The issue is having to print at f/22 or f/32 for a 8x10" prints.

It's covered on this thread: