I check my temps every morning before work and this morning my air temp was 73....I've never had it drop that low before, usually 76-78. I need to pick up a couple of che so this doesn't happen again. Will a 40 watt be powerful enough to raise my temps 5-6 degrees? Also should I have it night time only or run them during the day also? My day temps are 80-81. I'll be using them for a v400 and v211. Should I get a 40 for the smaller cage and a 60 for the bigger?