Well we have 4 models and a couple specialty offering occasionally. The base models are T1,T2, T3 and T4-2100. They all use CXB3590 emitters running at 75 watts. There are PPFD charts on the website at
www.tastyled.com but basically a T4 covers a 2x4 area, a T3 covers a 2x3 area etc. Although one of the testers seems to be getting good results with a T4 in a 4x4 area. The target intensity for the footprints is high 800s to low 900s, which is a good place to be in regards to getting high yield per foot while still not wasting electricity with over saturation.