Low light or medium shade, 800 fc
Bright shade 1,00-1,200 fc
Medium light for Oncidiums 1,800-2,000 fc
Bright light 2,200-2,400 cf for compact Cattleya and others
Bright(er) light for mature Cattleyas, the standard sized big guys, 3,000-3,200 fc
Vanda light 3,500 fc +
I am trying for 1,500 foot...