I designed my lighting and went to check what other people came up with, and could not find a detailed method. Thus, I am posting my method to hopefully save someone time. I am designing for Amycel 3015 blue oyster mushrooms, which they recommend 2,000 lux for 12 hr/day. My grow room will be 13 ft x 8 ft, with shelves on the long sides. The first two foot wide shelf will be 6" off the floor and the three additional shelves are 18" apart. The grow room will be 7 feet high. Placing T8/T5 lights on the ceiling will not give a good distribution of the light. Thus, I plan on building a frame on wheels that i will place in the middle of my grow room. I will be able to easily move the light to the side or out of the grow room for cleaning. The lights will be mounted horizontally facing the wall/shelves and will be located in the center of the room 4 feet to the wall. I selected a 18 watt 4 ft T8 LED bulb, KT-LED18T8-48GC-865-D, which has good specs. http://keystonetech.com/spec_sheets/KT-LED18T8-48GC-865-D.pdf PHOTOMETRIC CHARACTERISTICS Color Temperature (CCT) 6500K Luminous Flux 2000 lm Color Rendering Index (CRI) >83 Efficacy 111 lm/W Beam Angle 240º Visible Light Area 325º Assuming all the light reaches the wall and I have good reflective surfaces to distribute the light, I can estimate the lux the wall will be receiving. The area of the wall is 7ftx13ft=19ft^2 or 8.5 m^2. Each bulb will produce: Light (lux or lumens/m^2) = 2000 lumens/8.5 m^2 = 235 lux. I selected two 8 ft vapor proof fixtures (each fixture has 4 bulbs) for each side for a total of 8 bulbs per side or 16 bulbs total. https://www.prolighting.com/commercial-lighting/vatiflli/ledvaportights/v874ssubcxx00p0.html Total lux per wall = 8 * 235 = 1880 lux (close enough) Below are a few graphics that will hopefully help explain my design. The other option is to mount a set of lights on the ceiling, and a vertical light on each end of the room. This will remove the hassle of moving the lights when I go into the room. I also posted this on shroomery.org as well. One comment to date dealt with the amount of light. Most growers I have read about to date use only a fraction of this recommenced light. Another post indicated that as the light increases the water use by the mushrooms will also increase, which I interpret as higher yields. I think I also read somewhere that increased light intensity with blue oyster mushrooms results in darker mushrooms, which I hope will increase their market value. Please let me know if you see any problems with my design or calculations. Thanks!