Thanks, Brandon, and welcome to ATP. I attempted not to be all that "scientific" about light, but just to make the confusion less when it comes to what are the best (peak-Kelvin) bulbs/tubes to use. There are books written about light and its affects on plants (and also we humans) but not many people will take the time to read them. My information is based more on what I use in my own greenhouses, growing lots of various tropical plants, but mostly orchids.
Since I wrote that article several months ago, I have changed my T5HO fixtures so that they each now have four, 6500K tubes and two, 3000K tubes. Are these fixtures any better for growing my plants than the six, 6500K tubes fixtures? Time will tell.
Brandon, do you have a background/education in physics or even perhaps commercial greenhouse growing? I welcome any correction or expansion on what I post. Needless to say, my experience and education is more limited than many. I'm just a hobbyist grower.
