MH Lighting height question

[SalahiAndSon]

I just got a Sun Supply Maristar fixture and installed it over my 120g reef
tank. This fixture has 2X250w MH and 2X45w PC. How high should it be above
my tank? I started at about 15" but have raised it to almost 2' above the
water surface at this time. I did this mostly to control the heat issues it
created being lower. I have since ordered a chiller so this wont be as much
of an issue soon but I wondered what the best height to shoot for was?
TIA
G.

[BigHaig]

They say anywhere from 4-10". I would go for around 10" to keep some room
for air flow under the lights.



"SalahiAndSon" > wrote in message
.. .
>I just got a Sun Supply Maristar fixture and installed it over my 120g reef
>tank. This fixture has 2X250w MH and 2X45w PC. How high should it be above
>my tank? I started at about 15" but have raised it to almost 2' above the
>water surface at this time. I did this mostly to control the heat issues it
>created being lower. I have since ordered a chiller so this wont be as much
>of an issue soon but I wondered what the best height to shoot for was?
> TIA
> G.
>
>
>

[RicSeyler]

And adjust the height for proper coverage across the bottom of the tank..
High up more spread, but loss of intensity.
Go to a few websites with reefer's tank pics and get a general idea what
others are using.
Don't go to extremes either way... I ran mine about 10 in above the
water level. But the canopy
determined that.

SalahiAndSon wrote:

>I just got a Sun Supply Maristar fixture and installed it over my 120g reef
>tank. This fixture has 2X250w MH and 2X45w PC. How high should it be above
>my tank? I started at about 15" but have raised it to almost 2' above the
>water surface at this time. I did this mostly to control the heat issues it
>created being lower. I have since ordered a chiller so this wont be as much
>of an issue soon but I wondered what the best height to shoot for was?
>TIA
>G.
>
>
>
>
>

--
Ric Seyler