Help lighting!!!

Can you tell by the temp in your growing space, if there is enough light?

Depends on the size and type of light, and the amount of space you are workin with. if you have a 600 or 1000 watt light you should be creating noticeable heat for their space, in which case you will need ventilation. Cfl's or t5 can work in a tighter space without affecting temps too much. Whichever the case keep temps around 77, the less sparatic the temps the more stable the environment for the plants