Turning wine cooler into incubator help help please

[narnia077]

Today I started by stripping the back of all the cooling parts, I'm not very knowledgeable about circuit board So I hooked up the incoming board to another board and after some sparks and a little flame I realized I might need help from people who know about this kinda stuff so Friday I'm going to alpa electronics for help with wiring I got four fans from the cooler two biggish ones and two smaller ones so I'm cool for fans but I'm thinking of going with a light bulb any thoughts on that?
Any info very welcome