light issue

I'm currently in the 3rd week of veg using an 18/6 lighting schedule and I'm nowhere near being ready to change to 12/12 yet. BUT.... I just realized that in another few days I will not be here to turn the lights off after their being on for the 18 hours. (a timer won't work with my...

Anyone got a good suggestion? I have several varieties growing in an 8'x8' room with 3000 watts HPC. The grow room is a little too hot for this variety, I think--average around 90 degrees F. Lights are on 12.5 hours, off 11.5 hours. Other plants seem to do fine, but this particular strain gets...