I'm sorry but It's not especially respecting, it's outmoded and archaic and has been for a long time. WPG literally means nothing because the rule was based on old extremely inefficient t12 tubes, not the ultra efficient, high output t5's we have today, google about, no one really recommends wpg rule any more for this reason exactly, to draw comparisons between the two one is a candle, the other is a stadium light, or one is an ipod, the other a gramophone.
You should be thinking about co2, not light if you already failed, more light = more problems.