Heating mats cost alot of money, my set up maybe better, built this set up for under $100 and not only can I control heat & I can can control humidity......... just buy turning off lights....... something to think about. It works great for me...... growing area is 2'x6' long & I start my seeds in a 4" pots, right now it is running at 86f & 80 humidity depending on what lights I have on & how big of pots with water in them..... makes a difference........ the best thing it is heated by low 100w Flourescent that uses 26w each & by turning each one on or off, I controll all......
