Everything sounds ok to me other than the 100 degree temp. That is way too hot. 95 is really the hottest you want it to get. You may need to get a dimmer for the summer and keep the lamp from running at full power. 70 at night on the cold side isn't a huge deal, although I have had a friend who ended up with an RI issue during breeding season. 75 is definitely preferable for the lowest cool side temp, mine generally runs about 80.