I would ideally like to use 150W, but in the desire that I would like to use less electricity. Is there much of a difference in product from using a higher concentrated bulb?

from what i have heard the higher the watt on cfl the more its like a regular bulb i heard that from 26-55w are the most efficient and they work fine for me

how many plants u planning on growing?

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100 watts to 150 watts is not going to be a noticeable gain in your electric bill.

If it costs you $.10 per kilowatt hour, and you had the lights on 18 hours a day for 31 days (longest month). Your average electric bill would be:

100 watts = about $5.58 per month
150 watts = about $8.37 per month

P.S. - Hopefully you aren't talking about incandescent equivalent wattages.