Backpacker is right about the different colors of light for different stages of growth. Unfortunately he got them backwards. For vegatative growth you want a bluish or cool color light. This makes the plants bushier with more nodes (branches). When you switch the light schedule to flowering you'll want a more reddish light. This will make the plants stretch a little, but it is more condusive to making buds. Unless the package says something about the light being cool or daylight, or it has the proper K listed, it is most likely 2700K which is fine for an all around bulb. Check out the graph I modified a bit. You can see that the absolute best color (K) for vegatative growth is 5700, and 2450 for budding. Good luck finding exactly those colors, so we just try to get close. Ultimately we want a mix of about 85% blue and 15% red during veg, and visa versa for budding.

I suggest you read this thread: http://boards.cannabis.com/basic-gro...hing-mean.html. Toward the end I give more info about lighting, plus there's lots of good info for begginers.

I think you said in SnS's thread that you have a 75 watt light. That's more than enough to get seedlings going. They don't want much light. After a couple weeks, the more the better. For good lighting on a budget use Fluorescent tubes or CFLs. They make CFLs from 13 watts up to 250 watts I think, which is equivilant to something like 600 watts incandescent. Do not give your plants any nutrients, except perhaps a slight bit of B1, until they are at least 2 weeks old. Then start at about 1/4 strength. I woud do like Backpacker recommends and fill your cups more close to the top, while still leaving a little lip to hold water. You'll also need a fan for gently blowing your plants in a breeze, which helps the plants get strong so they won't break when they get heavy with buds. This will also help get fresh air to the plants, which they require.

I don't see a need to block off your space, and I don't think you need to make your pictures smaller. I post mine bigger than that. Most peoples' browsers are set to shrink the picture if it is bigger than the screen anyway. Then you also have the opportunity to enlarge to full size if you want to.

Hope that helps a little. Good luck.

PS. Don't over water. You should wait until the soil is almost completely dry between waterings.