First attempt at a 24-hour "Martian Method"

[salmayo]

The flowering light schedule will be as follows

10 hours of 400w 2K HPS
1/2 hour of black light (to hasten photoequalibrium transitions from Artificial Light to PAD)4 hours of 100w Red Inc's
1/2 hour of black light (for transitioning from PAD to SID)
9 hours of SID (standard indoor darkness)

You don't need this 1/2 hour, even 15 minutes would be more than you need. I'd keep the (second) 1/2 hour Blacklight (Darklight) during the transition to SID to hasten that transition, but you only gain about 1/2 hour in the process, so you could get rid of that if you wish.

Another option you may want to consider is using the Darklight during the entire night, but there are stem elongation characteristis to consider.

I actually tease more stem elongation later in the flowering process using spectrum not timing, but spectal considerations do dictate time requirements.

I hope that gives you more answers than questions. :thumbsup:

I'll email you some stuff soon. I'm swamped with redoing an HID set-up myself at the moment.

Take Care, Sal.