Help Metal Halide Problem

ptolemyxxi · 01/16/2010, 04:13 PM

Hi

I am new to this site, I am just starting out keeping marine fish etc and am slowly assembling all the components etc required for a reef setup. The reason for posting now is that I have recently bought a 150w metal halide fitting from a lighting supplier and a 14000k bulb from a marine store, I have plugged in the light to perform a test run and the following happens, The light switches off periodically on its own and after about 10-15 sec will start up again and will stay on for about 10min before switching off again. The fitting is located inside the hood and no fans are connected. Could someone help me as to why this is happening. Many Thanks

gdsmith56 · 01/16/2010, 05:43 PM

Where do you have the ballast? Is it getting air circulation around it? Sounds to me like a thermal switch is cutting in (turning the ballast/bulb OFF) due to high heat.

luther1200 · 01/16/2010, 06:00 PM

Did you just buy it brand new or used?

ptolemyxxi · 01/17/2010, 10:53 AM

The light is brand new and is a complete unit with integral balast usually used for external car parks etc etc or internal halls etc etc, it is waterproof and rated to 150w, I have a 14000k 150 watt lamp in it, There is no air corculation in the hood however i have left the door to the hood open

01/16/2010, 04:13 PM	#1
ptolemyxxi Registered Member Join Date: Jan 2010 Posts: 2	Help Metal Halide Problem Hi I am new to this site, I am just starting out keeping marine fish etc and am slowly assembling all the components etc required for a reef setup. The reason for posting now is that I have recently bought a 150w metal halide fitting from a lighting supplier and a 14000k bulb from a marine store, I have plugged in the light to perform a test run and the following happens, The light switches off periodically on its own and after about 10-15 sec will start up again and will stay on for about 10min before switching off again. The fitting is located inside the hood and no fans are connected. Could someone help me as to why this is happening. Many Thanks

01/16/2010, 06:00 PM	#3
luther1200 Premium Member Join Date: Feb 2009 Location: NJ, shore Posts: 4,376	Did you just buy it brand new or used? __________________ Matt, 65G reef tank Current Tank Info: 65g reef, mix of sps, lps, few softies. Hoping to upgrade within the year.

01/16/2010, 05:43 PM	#2
gdsmith56 Moved On Join Date: Dec 2009 Location: Harpers Ferry, WV Posts: 122	Where do you have the ballast? Is it getting air circulation around it? Sounds to me like a thermal switch is cutting in (turning the ballast/bulb OFF) due to high heat.

01/17/2010, 10:53 AM	#4
ptolemyxxi Registered Member Join Date: Jan 2010 Posts: 2	The light is brand new and is a complete unit with integral balast usually used for external car parks etc etc or internal halls etc etc, it is waterproof and rated to 150w, I have a 14000k 150 watt lamp in it, There is no air corculation in the hood however i have left the door to the hood open