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Im looking into getting a 150watt hps sun system plug n play system to compliment my 3 68watt clfs and 2 40watt clfs and i was wondering if the 150hps system would show a noticable jump in the electric bill? The clfs dont seem to raise it much at all much but would just the hps system added even...

So I'll start by describing my setup, its a hollowed bookshelf with the backside open and front covered. Inside of the bookshelf lined with white paper. The lights I am using are... - 2, 4200 lumen flourescents in metal reflecting hoods. (About 4-6 inchs away from the tops of the plants. - 2...