@softsecrets,here's what i (was) am doing:
i started flowering full power with 500w (2 X250w) HPS and mars 400w led reflector all together..
as spring has threatened to lift the night temps (which is when i am lights on) i needed to let go one light which was hps or led...decided to let go led this time and since week 4 flowering i went on with 500w hps only...that kept my room stable at 25-27c during light on.
i think i mentioned it earlier in one of my diaries - ROOM TEMP IS WAY MORE IMPORTANT THAN LIGHT INTENSITY