stupid question from advanced grower !!

[doubleds]

Havnt needed this answered in 20 years but thought i would ask. My room is 8 x 7 feet, i have 3 1000 watt hortilux(cool tubes), 2 x 38 pint dehumidifiers and one 12000 btu ac unit. My temp runs about 82 degrees.
I am in my last 4 weeks of 10 flowering and i popped in a 600 w hps hortilux non air cooled reflector and after about 7 hours of 12 the temp gets to 90 degrees.

My question is this, with my 3 1000 watt lights burning for 12 straight hours, can my 600 watt hps work intermittently. By that i mean off for 3 hours, on for 6 and off for 3 hours during the 12 hour cycle. I dont think there would be any problems because of the 1000's burning straight but wanted to ask just in case.

Thanks in advance

dds