About 2 months ago I swapped out my 250W MH for 400s and added some additional actinics. Well, the bills are coming in now and wow, what a jump! When I made the switch to the 400s, I used some screen wrapped PVC over the course of about 1 1/2 weeks to acclimate them to the brighter lights. My question is strictly in terms of moving back down to the 250s, is there any sort of recommended acclimation period for moving to lower wattage lights? Current lighting period is just about 6 hours with the 400s.

Thanks,
Mark