There's a good thread discussing initiators that's been going for a while, that's a whole other subject in itself.
https://www.rollitup.org/t/the-far-red-thread.867665/
I've been using 660nm for 10 minutes before lights-on, and 730nm for 10 minutes at lights out for a couple of years. Combining the initiators with 11.5/12.5, I currently have 6 cuts that finish within 49-53 days from the flip. Nothing out of ~15 strains I'm cycling runs longer than 60 days, other than a Panama cut which typically takes 11-13 weeks, it finishes in 70 days.