Help grow box emergency

i have a problum i think my grow boxs low temp is like 88 F and its at like 100 right now what do i do to lower the temp in the box a fan in the ive got an exahust fan an intake fan and a fan inside blowing on the seedling i dont want to lose another plant

Well fans are a good thing-- what about a portable a/c unit to blow cool air in? I'm not too sure what else to suggest... What kindof lights are you using? Are they giving off a lot of heat?

400w mh in cool tube