LED lights are pretty much single or very narrow spectrum. So a whitish LED will not feed your DF at all, unlike a broad spectrum fluorescent bulb. You need a color that's in the absorption range of the plant. Those are the spooky red and blue colors and your neighbors would wonder if you're growing pot when that was illegal. Search for grow LED in eBay to find them. Our member (Kevin? CoPlantNut?) In Colorado has been using them in the basement during winters and has firsthand experience.
I don't think that is true, the white LED light will give some usable light to the plant. However it would not be as much as a specialized LED grow light.
This looks like a decent wattage to start at. I would consider getting a tall grow tent 3'x3'x8', or doing it cheaper and getting some white cardboard to place around and a stand to hold the light above the plant.
http://www.ebay.com/itm/151374521551?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true
Hey Null, cool ideas. Based on what I've read (linked above) commercial growers are using just 6w LEDs in the 2700k spectrum (the red end) to shock the plants into flowering. A 300w grow light with tent would be great for indoors, but, from what I can tell, that's overkill for growing outside. Besides, my plant is already 9ft tall x 6ft wide
I don't think they're trying to get complete light coverage, more to just let the plants know it's daytime. I could see maybe a 50w red spectrum LED grow light outdoors, as long as it's waterproof.
Then again, the lights I got are 3000-3500k. Pretty red when they're lit up, definitely "warm white" not daylight, but maybe they need something closer to 2700k to trick the DF into flowering.
The commercial growers only turn on the lights from 10-2am using this setup (CFLs in the pic):