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I'm just going to gently wade in and agree in principle with tip top toker. Equivalent watts not only mean nothing in terms of growing potential, they are in fact totally misleading. They are figures conjured up by the bulb manufacturers in order to indicate the amount of watts an incandescent bulb would need to draw in order to emit a similar amount of 'light'. This doesn't take into account heat output or spectrums, and is therefore fairly irrelevant to growers.
It would be like wanting to know that your 15w cfl 2700k bulb was equivalent to 150 flash lights, or 300 candlesticks. Because we aren't interested in using either flash lights or candles to cultivate a plant, the 'equivalent' amount is meaningless, imo. Instead, what we do know for sure is that the 15w cfl 2700k is exactly that, and the general consensus is that growers should be using a minimum of 100w of 2700k cfls in order to flower a single plant. I feel it's much easier to compare and contrast results when we're all following the same lighting standards.
For the record, I also don't think it's wise to compare cfl watts with HPS/MH lighting. Both types of lighting require slightly different growing techniques in order to achieve maximum potential. CFL growers tend to use cfls for a reason (space and/or cooling constraints, and budget, usually..), so the suggestion that cfl growers should dump their bulbs and get an HPS setup is moot. We can all agree that HPS systems produce the highest yields, watt for watt, but not all growers (especially hobby growers) need to be drawing 400 watts and cooling an HID bulb in order to grow a single plant.
My two cents, carry on fighting.