How high are your halides?

smariner · #1 04/08/2002, 09:01 PM

How high is the "average" metal halide off of the water. I'm trying to decide if a 12" canopy will do the trick...

thanks,
smariner

Newreeflady · #2 04/08/2002, 09:19 PM

My canopy is 12", so i'd say the bottom of the bulb is about 10.5" away from the water.
All is well

Angela.

smariner · #3 04/08/2002, 09:52 PM

Thanks, I'm in the process of putting together a 360(84"(L)x32"(W)x30"(H) SPS only setup and wanted to be sure that 12" would do it... It's going to have 5 400 Watt Halides(3 6500's and 2 20K's) as well as VHO's.

fcam44 · #4 04/08/2002, 09:59 PM

I have my halides 7" above the top of a 180g bowfront.

kevinpo · #5 04/08/2002, 10:02 PM

Mine are 9" off the water.

HTH,
Kevin

Kenzy · #6 04/08/2002, 10:09 PM

On mine the lamp center is 6" from the surface of the water.

smariner · #7 04/08/2002, 10:10 PM

fcam44: You have heat problems w/ them at close? Anyone else running that close in a canopy? I assume that you have an appx 10" canopy?

thanks...

fcam44 · #8 04/09/2002, 07:18 AM

I'm re-doing the tank now but when it was running I just had 2 big fans off the back blowing around...between the airflow and evaporation I was fine.

deansreef · #9 04/09/2002, 08:38 AM

mine are approx 8" from water hope this helps dean

chuck p · #10 04/09/2002, 08:43 AM

My mh is 6.5 inches above the water 250w on a 58 gal.
Chuck

JerseyReef · #11 04/09/2002, 10:58 AM

Mine are 3" away from the water surface

fcam44 · #12 04/09/2002, 11:05 AM

JerseyReef - What kind of wattage lights do you have. 3" huh? Seems really close!

Bender · #13 04/09/2002, 11:06 AM

I have a 12" canopy and my 250 watt halides are about 7" off the surface of the water.

Bender

jayd · #14 04/09/2002, 11:08 AM

Woohoo, I can finally participate in MH conversations! I just got my hanging canopy for my 29 put together.. I've got a 250w Iwasaki suspended about 9" from the water level. Man, what a difference compared to VHO's

newkie · #15 04/09/2002, 11:41 AM

My 250s are 2" off the water.

panther g · #16 04/09/2002, 12:54 PM

My 175 MH's are kept about ten inches off the water. Wen it was closer my tank temp went up alot.

R334 · #17 04/09/2002, 01:16 PM

250w HQI

8" from surface

yikan · #18 04/09/2002, 01:37 PM

The height really depends on:

your tank depth
your MH wattage
heat problem?

I am having a very shallow (~16") tank, I hang my 2x150 HQI above my open-top tank approximately 12 inches.

ridetheducati · #19 04/09/2002, 02:03 PM

2 x 400w MH 6.5k Iwasaki
2 x 400w HQI 20K Radium

10 inches from water surface