New lights, what is safe for SPS

[RuGlu6]

Hey guys,
Question for those of you who has an experience in changing the light source for SPS corals.

What do you think is the safe start would be?
I am switching from 6xTek T5 to a 2xDE250W HQI + 4x39W t5 actinics on a 36" long tank 65 gal.
How many hours per day should I start from and what is the safe schedule to bring SPS to a full 8-9 hour MH DE lighting period?
Thank you.