Mercury Vapor bulbs?
- Thread starter 2014LML
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hotrodharley
Well-Known Member
https://www.buydutchseeds.com/growing-guide/light-for-marijuana-indoor
"The easiest HID to buy, and least expensive initially are the flourescent and mercury vapor lamps. MV will put out about 8000 lumens per 175 watts, and 150 watts of HPS puts out about 15k lumens, so HPS is almost twice as efficient. But the color spectrum from MV lamp output is not as good. HPS is high in reds, which works well for flowering, while the Metal Halide is rich in blues, needed for the best vegetative growth. Unfortunately, MV lamps provide the worst spectrum for plant growth, but are very inexpensive to purchase.They are not recommended, unless you find them free, and even then, the electricity/efficiency issues outweigh the initial costs saved."
"The easiest HID to buy, and least expensive initially are the flourescent and mercury vapor lamps. MV will put out about 8000 lumens per 175 watts, and 150 watts of HPS puts out about 15k lumens, so HPS is almost twice as efficient. But the color spectrum from MV lamp output is not as good. HPS is high in reds, which works well for flowering, while the Metal Halide is rich in blues, needed for the best vegetative growth. Unfortunately, MV lamps provide the worst spectrum for plant growth, but are very inexpensive to purchase.They are not recommended, unless you find them free, and even then, the electricity/efficiency issues outweigh the initial costs saved."
2014LML
Well-Known Member
400
I know about the spectrum ends, etc. I love my 600 nanolux! Its so small and quiet & cool. I was just curious about the MV part. This is my first time really seeing anything about them.
ttystikk
Well-Known Member
That's a big lamp for UVB supplementation. It would be good in a 10x10' area or so, along with your choice of base lighting for the space.
2014LML
Well-Known Member
I doubt ill use it for anything other than MH in a standalone veg area. I was just curious is all!
ttystikk
Well-Known Member
Lots of better choices for that job. Small veg loves T5 or T8.
2014LML
Well-Known Member
Right you are, sir. I should of worded it differently, as it will be no time soon that I will fill up a space big enough to justify having a standalone veg area (because someones got to pick up my slack when I'm gone & the less shit I have to hear, the better). 1st world problems. I am curious now though as to what the final product result would be with a bulb burning @ 4000 kelvins..
ttystikk
Well-Known Member
I run the Philips 860W CDM lamp. It only runs on a magnetic thousand watt ballast on the metal halide setting. It only runs vertically, base either up or down. It's the same color temperature as what you're considering, it's inexpensive because of the affordability of the ballast and it makes really nice product.
2014LML
Well-Known Member
It burns at 4000 kelvins, yeah?
I've been following someone on YT that has 3 315w Philips and between ,and 300w spectrum king led, and a gavita (only 1 plant per each light) around the same lvl the cdm imo is the best...it's such a bright brigghhht light
ttystikk
Well-Known Member
ttystikk
Well-Known Member
The 315W LEC lamps have digital square wave ballasts, which is what makes them more efficient. Otherwise it's the same tech I'm running.
ttystikk
Well-Known Member
Spectrum King is garbage; a Chinese made high bay LED rebranded as growing gear. Don't use that as a yardstick for what LED can do, the guys in the DIY LED section here on RIU are doing some serious work.
I'm not surprised the 315W lights are doing better than the DE HPS, the spectrum is a big improvement.
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