Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
For aggressive lighting power reductions, it's not a question of "state of the art" but rather what are the lowest illuminance levels an owner will consider acceptable, while also deemed satisfactory to occupants on multiple levels of visual and functional experience. Current technologies are a fairly level playing field and you can't say for certain that deploying technologies X, Y, and Z will give performance A.
In addition to "how low can you go" it's also a question of where each criteria is deemed necessary, either as a blanket of uniform light across entire spaces, or if limitation of enhanced lighting at particular work areas will be accepted.
I agree with a previous response (although I'm admittedly biased) that verification of targets by a lighting designer are the only way to determine a project specific answer.
