Reds
Member
Graingers catalog shows the lumens for each bulb. If I understand correctly Lumens is the amount of energy a light source releases directly at the source (radiance). Footcandles or Lux is the amount of light that would strike a surface at a given distance (illuminance). I believe to get footcandles you would need to go to Ruud or LSI and have them do a lighting plan for you. They usually do this for free if you submit a site plan. But lumens is a good place to start looking at how much light the bulbs emit.