If you are following my youtube channel, you’ve probably already seen this. If not, here it is again. This is an introduction to grow lights where I cover what are the important aspects of light relevant to plants and compare a couple different types of grow lights (T5 vs LED).
To sum things up, T5’s are cheaper out of the gate. But LEDs are more bang for the buck in the long run.
Far red (740nm) might be very beneficial to tomato production. Studies have shown that it can help produce longer “hypocotyl” (the seedling shoot that becomes the stem) by just blasting the plant with 12 minutes of light at the end of the day (16hr photoperiod with T5 lights). Other studies claim that far red can help reduce or eliminate sucker growth.