400 20K With 6,500 K\How Long

[peterh1975]

For those who use 400s that is combined with 20K N 6,500K, How long do you leave your 6,500K on ?

[ron4675]

I run my 400w 20k radiums for 10 hours and my 250w 65k iwasakis for 5 hours.

[golfish]

I use 2x400 watt Radiums and one 400 watt Saki. I run em all 10 hours a day.