Flipping to flower......

Ok guys and gals! Flipping these ladies to flower this weekend with a couple of questions. 1). Should I raise the lights immediately since I will be switching from MH to HPS? 2). Do I immediately switch my nutes to bloom from grow on day 1? Learning alot from you guys but still lots of questions! Thanks in advance!

Bloom and flower nutrients are combined right up to the last couple weeks before harvest
Flipping is fine unless you are going from say a blurple to a 1000 watt HPS
Then you need to increase light intensity slowly aka hardening off

I raise my HPS light up from when I switch. I also don’t switch mine until ~2-3 weeks in.