Just plug in a few CFLs! check out the CFL section in the indoor forum to see what they can do. When its done right the results are similar to that of hps/mh at much less cost, heat, and space. It really is the best way to get the ball rolling.
In case they are new to you. a cfl is a Compact Florescent Light. Designed to replace most lamp,wall,ceiling regular bulbs(incandescant), they use much less power, are nearly cool to the touch, and put off some good useable light(make sure you buy ones marked "Daylight" or 6400k for veg and soft white or 2700k for flower, mix and match is ok) they look like this.
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Here is my current grow using CFLs. In this shot i have 7 total 23watt cfls. If my Ventilation and ph(and ppm ugh) were better the plants would be much happier. After this shot i added 6 more lights on the sides. In about a week i will have my HPS/MH light and am ditching the CFLs.
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