OUTER ORBIT HQI Metal Halide

I have a 120 gallon salt water tank. 48 X 24 X 24 (I think)
It is built into my wall- open top -no canopy or glass. The wall
chamber is big, open and well ventilated
Currently I have some fish, bubble tip anomie and a few leather /
mushroom corals.

My 48" ORBIT 1024 light had blown a ballast and a fan so I thought I
would upgrade to the Outer Orbit model 1042 as I think I was under
lighted before and would like to start stocking my tank. (2 x150 and
blue 2x130 tot output=560)

Well.... after installing the new light my water temperature rose from
a steady 74 to a whopping 85

Can you please help me understand how I can try to regulate the temp
with out buying a 700 dollar chiller? I have unplugged my heaters, and
suspended the light assembly about 8 inches off the top of the tank. I
tried to start out slow-run the light for 4 hours and then increased
each day....

My bubble tip anemone is horrified and has shrunk way down in size, the
green mushrooms have curled up, and my toadstool mushroom has not
extended its polyps since I put the light in 8 days ago? I developed a
gross greenish black chunky alage on the tank bottom- and I need to
clean the tank glass once a day to remove thin green film?
PLEASE HELP WITH ANY SUGGESTIONS. or I will be having fried fish for
diner!

What do you recommend for light cycle times-do I need to run the
Halides for 6-10 hours ?
How far above the tank can I hang the light with out losing the
benefits of the high output ?
Can I run an external fan over the surface of the tank ?