Hey, tkid180. All the advise you've been getting is sound. If I may offer you some more sound advice... DONT DO ANYTHING UNTIL YOU BUY A NEW LIGHT AND DO A LITTLE HOMEWORK! Once you start them, they wont wait for you... You seem very eager to learn the proper way of doing things, which tells all of us, that your probably going to have a successful grow.
The first thing you should do, is go get a new light . I would suggest this one...
http://www.insidesun.com/0072185327b45b84d573c69bb829f6e1.item 145 bucks is a really good price for that. It's 400W High Pressure Sodium. You can grow your plants from seed to smoke with this light. The 600W is in fact a better light, but seeing as your growing in a closet, it's almost better for you to use this one.
Another major point for you to remember is reflectives. You should empty your grow closet, and paint the walls the brightest flat white paint you can find. This will help the light reflect off the walls, and create a better lit environment for your ladies. If you can afford it, eventually... Mylar is better.
I've gathered from the comments that your growing in soil. If I were you, I'd stay as far away from Miracle Grow as you can. Their nutes can be hard to work with w-out burning your plants up. The best soil on the market for cannibis(IMO) is Fox Farm Ocean Forest. It can be VERY expensive to have shipped, so if you cant find it in your area, than I'd suggest you go with Jiffy Soil. It can be found at most Wal-Marts. If you really want to do some homework, learn a few tricks on organic fertilizing. there are some organics nutrients you can add to that plain Jiffy soil that will help your girls thrive, like worm castings, bat guano, Llama manure, fish compost,ect...
Once you've got your light and your dirt, your gonna' have to make sure you got your light on a timer.(Not sure if you know about how Photoperiods work. If you do, skip this paragraph) Your plants will grow in two stages. A Vegetative growth stage, and a flowering stage. The vegetative growth is when your plant is establishing itself. growing tall, adding gearth to the stalks to hold the weight of the buds that will some day be. Vegetative growth is maintained by keeping your lights on a timer that will turn them on for 18 hours and off for 6. When your plants have "vegged" for long enough, your gonna want to change them to Flowering. This is accomplished by cutting the timer to 12 hours of dark, and 12 hours of light. Your plants will be ready for harvest, 8-13 weeks after 12/12 photoperiod begins.
This is all the information your gonna' need TO GET STARTED! There are more little bits of info your gonna need. I suggest getting a couple of informative videos and watching them before you crack your seeds, or buy your clones. we have a forum for obtaining these videos.
Start a grow journal the minute you decide to start them. It should be noted that when posting your grow journal, it will be very useful to post pics of everything. Most members wont even offer help if they cant
SEE what your problem is.
Send me a PM with a link to your grow journal, when you start it.
Once you get everything you need... NOW you can get your seed. What your looking for is a very user-friendly strain. Northern Lights strains are traditionally very good for beginning growers. Your probably gonna' want feminized seed, as well. You want something that's gonna' put up with alot of stress. Here's a couple feminized, noob-friendly strains...
http://www.cannabis-seeds-bank.co.uk/white-label-seeds/white-label-feminized-seeds/white-label-northern-lights-feminized/prod_511.html
http://www.cannabis-seeds-bank.co.uk/th-seeds/th-seeds-feminized/t-h-seeds-s-a-g-e-feminized/prod_776.html