ok i have had a corn for a few weeks and its only 3-4months old and about a fod long!! and i have 1 large heat mat another small 1 and a 60w bulb and for me to get 80f all 3 must be on!! i have a glass viv and its not keeping the heat in!! the shop i bought him from said keep the light on for a max of 12hrs a day but as soon as i turn the light off it drops to 20 even with the heat mats on!!!! i really need help!! thanks