Actually in this case I meant wattage, not visual intensity. The red/blue 'tube' leds are sold as 10W (sometimes 15W), but I've never had one draw much more than 5W. I don't have the equipment to validate my assumptions, but I usually assume given the same wavelengths (ish) that the more wattage the fixture draws the more light I'm getting. I'd really love to get the tubes as true 10W, or using a different chip, but I'm limited to what I can purchase.
That said, I still use them. I'm mixing them 1:1 in fixtures. White and color. It does seem to be a good solution, white is nice for viewing the plants, and the color is there to add to the growing spectrum. It is just one of many setups I'm trying...
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