Quote Originally Posted by LLLou2
The light from below will compensate for the upper branches blocking light to the lower branches, so I think it is a good thing , BUT, you need to be sure that the Kelvin output of the bulb is close to 2700k. otherwise you are just wasting electricity. Bright does not = correct color spectrum, and the plant wants it's light in a certain spectrum of the color range,,,,,,just like a woman.:jointsmile::jointsmile:
That's only true for flowering, and it's not 100% essential. Just helps the buds thicken up since the the extra red in the spectrum promotes the creation of chloropyhll B better than blue.

I think Side lighting is very important when not using HID lighting. Even then it can help fill light gaps. It may help a LITTLE to have it pointing at the underside of the leaves, but moving it to the side would undoubtedly be more beneficial.