Cold and hot temp changes

Hi... my first post here. Have been reading yours for 3 months,,, thanks!
I think my 6 month old Afghani and Lemon Kush girls have turned male or hermafite??? because of temp changes ( up n down from 15C/60F to 41C/100+F inside my 5x4 foot grow room) or from another possible issue. Any ideas?
I started a legal grow (thanks Health Canada) in soil mix, in Aug 2011 with 2 Afghani mothers that just appeared here the day after I got my permit! I cloned 9 more from them and they did great.
I'm in Canada so I built an insulated grow room inside my storage shed. At first I used Florescents and reg plant food. I got 2 400w HPSs and a Technaflora nutrient kit from British Columbia (thanks Twister Up) when flowering time came. I started the flowering nutes and 12/12 lights on Nov 25th. I had a heater timed to come on when the lights were off, and changed that when the outdoor temps dropped to minus 10 C so the heater also came on every hour for 30 mins while the lights were on. The set up didn't work well, I couldn't control the in room temps,,,, they grew well, but were not budding!!! . So on Jan 22 I moved 6 of them into my basement, under Florescents with a constant temp of 20C to see if that would help. So far, after 8 days I've got faster growth, but no real budding. I took some pics today, Feb 1.
The other possible big issue is I added 4 Lemon Kush that I started from seed,,, and I may not have sexed them well enough.

Thanks for any ideas, even if it is to tell me I fucked up!

did you have any intake or outtake fans for when the heater was on? it seems like they needed some ventilation when the heater kicking on. it may have been a good idea to hook a timer to both a fan and the heater for them to come on together to keep the temperature under control.
i wonder how high your lights were to the plants in your shed?

also, to avoid getting stretched, try a little training to keep them compact and bushy.
the 6 look so epic though!

Thanks.. in the shed I had a fan with the heater at floor level, and a hole in the ceiling that I could adjust.... not the best. I moved the HPSs up once to keep them 12-18 inchs above the tops. If people think they just need more time to bud, I can increase the basement temp and lights adn move the other 3 girls in from the cold.

It's impossible that your indoors temperatures are 41°C. I live in a hotter area than you do an it never gets over 28°C under roof, that with an scorching 40°C+ blasting my roof. What you might need is a passive intake in the bottom of the tent, then hang your carbon filter/fan an exhaust to the outside (could be a room as well) this will also bring down the humidity to a perfect 40%. Problem solved for Daytime temps and RH, However this wont fix it for the nights which are too cold and could lock P and K! so my suggestion is to stick with the same plan but flip the lights from day to night so the plants sleep at day when is hotter further helping your lamp/bulb increase your night temps, this will shorten a lot the temperature differential between night day greatly optimizing your environment. By the way, you'll need to make sure your tent is light tight for this to work. Best of Luck

Thanks for the P & K lock info...
A couple weeks before I moved to the basement it was getting to minus 20C (about 0 F) outdoors, and my in room temps were 18 to 20 C with both lights and heater on.... not warm enough, so i increased the heater to 60 mins on / 30 off while the lights were on, and closed up my exhause hole a bit more. Then we had a warm spell of minus 5 C and when I went in to water, it was 41C inside and all 9 plants were completely wilted from top to bottom because of the heat. No shit,,,, a scary sight. They came back up by the next day, but that was what made me decide to move to the basement. Someone told me big temp fluctuations like that can turn a female into a hermi, and since they are not budding after 8 weeks, I'm worried.

Well extreme situations take extreme solutions: You need a heater/dehumidifier with a thermostat, plain and simple. Set it at 25°C and run it all day long. There's not going around it IMO