Out of curiosity, since I haven't seen it mentioned: do the LED units use an integrator for exposure, or are exposures simply by a timer? I understand these "bulbs" are rated for thousands of hours, and exposure times are very fast, so the notion of an integrator to adjust time to get proper light units is probably moot, but I haven't seen any mention of one, and was curious.
If someone had a MH unit that crap the bed but used an integrator for exposure length, upon retrofitting with an LED unit, they'd also have to wire in a timer, correct?