Overclocking a de cmh bulb to 1150?

Gemtree

Well-Known Member
Is there any degradation of the spectrum when dimmed or over driven?
They say there is a good deal of change with cmh because the spectrum is based on the exact temp the gas burns at. I guess even air cooling it affects the spectrum and even if its in a vertical or horizontal hood. I use a 315w for veg and I love it its a cheap horizontal 3k phillips but the spectrum seems fine for being horizontal.
 

Renfro

Well-Known Member
They say there is a good deal of change with cmh because the spectrum is based on the exact temp the gas burns at. I guess even air cooling it affects the spectrum and even if its in a vertical or horizontal hood. I use a 315w for veg and I love it its a cheap horizontal 3k phillips but the spectrum seems fine for being horizontal.
Yeah we all know what "they say" I was asking for his take because he works for a lamp manufacturer. Hoping he has some real data showing a spectrum shift or change when operating at different wattages. Never mind if the lamp life is reduced, but what happens to the spectrum, like you said when the arc temperature is different.
 

Gemtree

Well-Known Member
Yeah we all know what "they say" I was asking for his take because he works for a lamp manufacturer. Hoping he has some real data showing a spectrum shift or change when operating at different wattages. Never mind if the lamp life is reduced, but what happens to the spectrum, like you said when the arc temperature is different.
Didn't recognize it was you with the new avitar lol cant wait for the new season
 

dennis000

Active Member
What CMH bulbs do you have that are made for high frequency ballasts? The whole reason I bought my revolution deva was to run cmh that require low frequency square wave. Yes I have heard it's worse on the cmh than the hps. The rep for cultilux told me he would replace it if I ran it at 1150 because he wasnt aware of anyone including there engineers that ran it at 1150
Any CMH bulbs can work with high frequency ballast, but with the risk of crack, low frequency square wave ballast is reliable for CMH.
 

Cultilux

New Member
Hello everyone, Rod from Cultilux here. You should NEVER dim or Super Lumen ANY dual arc tube CMH bulb. It will most definitely change the spectrum, certainly shorten the life of the bulb....but in reality tests show the attached pic as the result of dimming or overrunning CMH, more times than not. Hate to see you burn a building down just to see if you can dim or super lumen your CMH bulb!! Any questions I will be happy to answer. Happy Growingthumbnail_998BD82B-5C73-4839-9035-8747060835D8.jpg
 

MisterKister

Well-Known Member
Hello everyone, Rod from Cultilux here. You should NEVER dim or Super Lumen ANY dual arc tube CMH bulb. It will most definitely change the spectrum, certainly shorten the life of the bulb....but in reality tests show the attached pic as the result of dimming or overrunning CMH, more times than not. Hate to see you burn a building down just to see if you can dim or super lumen your CMH bulb!! Any questions I will be happy to answer. Happy GrowingView attachment 5022045
Glad you guys added a glass sleeve to your lights.
 

Cultilux

New Member
Yeah we all know what "they say" I was asking for his take because he works for a lamp manufacturer. Hoping he has some real data showing a spectrum shift or change when operating at different wattages. Never mind if the lamp life is reduced, but what happens to the spectrum, like you said when the arc temperature is different.
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I have the data
Glad you guys added a glass sleeve to your lights.
Thanks man. It was a must do and one of the first things I changed upon my arrival here. I do not even push these honestly. If a customer asks they get them. I would rather see them using the dual 500w or 630w or even numerous 315s. LED is pushing all of the HID market to the side quickly though. Unfortunately, if you are an HID bulb user, they may be relics in the near future. Happy Gowing
 

MisterKister

Well-Known Member
Thanks man. It was a must do and one of the first things I changed upon my arrival here. I do not even push these honestly. If a customer asks they get them. I would rather see them using the dual 500w or 630w or even numerous 315s. LED is pushing all of the HID market to the side quickly though. Unfortunately, if you are an HID bulb user, they may be relics in the near future. Happy Gowing
Your customer service is top notch. I had a defective bulb and you guys were quick to replace it! Thanks again.
 

tkufoS

Well-Known Member
Thanks man. It was a must do and one of the first things I changed upon my arrival here. I do not even push these honestly. If a customer asks they get them. I would rather see them using the dual 500w or 630w or even numerous 315s. LED is pushing all of the HID market to the side quickly though. Unfortunately, if you are an HID bulb user, they may be relics in the near future. Happy Gowing
Hid has been around for how many years ? Now you won't be abe to get bulbs/lamps soon / near future ? Where is this listed as fact ? I would love to do further research sir/mam .
 

tkufoS

Well-Known Member
Thanks man. It was a must do and one of the first things I changed upon my arrival here. I do not even push these honestly. If a customer asks they get them. I would rather see them using the dual 500w or 630w or even numerous 315s. LED is pushing all of the HID market to the side quickly though. Unfortunately, if you are an HID bulb user, they may be relics in the near future. Happy Gowing
Nevermind.. You said maybe.:?
 

Cultilux

New Member
Hid has been around for how many years ? Now you won't be abe to get bulbs/lamps soon / near future ? Where is this listed as fact ? I would love to do further research sir/mam .
I did say maybe....lol,:lol: but in all honesty I don't think it will affect the personal user of those types of fixtures. It will, however, affect the commercial or caregiver side of the industry. I have a theory that if your facility is running 277 then they (government entities on all levels) will probably allow you to use HID fixtures in a commercial, boutique or caregiver facility, but my guess is there will be added taxes or fines....where as with LEDs they give you and will continue to give you rebates. We will know for sure in less than a couple of years. Happy Growing.
 
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