I use a 65 or 75 watt for my incubator, definitely up the watts... Is your incubator in a colder area or a regular 75 degrees, because I have mine in my basement and I insulate it...hoping to set at least 19 eggs soon gota get my bator regulated.. haveing probs getting my temp up. any ideas should i try diff bulbs?? (useing 2 25w candle (shape) bulbs would a differnt type work better or should i try uping the watts??my junkubator cost me $0 to make. 14inx 17 in x 29in. will hold over 40 eggs on homemade turners.