hey tyler, thanks for stopping by. So you think that dimming down to 400 shifts the spectrum too much? I've been wanting a galaxy/solistek so I could possibly veg under 400 watts b4 I flipped, does that seem like a bad idea? what ballast are you using atm? what bulb/ballast were you using when you dimmed and it was humming? have you grown w/ 400 watt dimmed different bulbs w/ decent results?good read. so it appears dimming DOES have an effect on spectrum. seems like its marginal in HPS but quite significant on MH. as well as the dimming percentage and if the bulb is coated. I don't see anyone dimming down to 30% however a 1k is dimmable to a 400 which is a 60% decrease and goes over the 50% threshold for drastic change. so thats some good info right there, don't dim a 1k to 400 (which i have done, and noticed a hum on one of my bulbs which caused me to switch it immediately back to the 600 level but only that one bulb, which i felt was due to the somethin with that bulb as oppose to the dimming system). thanks for the contribution!!!
please forgive me if im wrong but i read somewhere (i think from a instruction manual from a digital ballast company) that you have to "fire"/start your ballast at full power (for a 1k bulb) 1st. before you dim it down to, lets say 600watt.
is it me or does anyone else have a problem w/ this? im looking to upgrade (from a 400watt mag. ballast w/ a CMH bulb to a digital ballast w/ ultra sun's dual arc 1k bulb), but im having 2nd thoughts being that i have to be there to dim it down to 600watt.
is this true or can i just leave it at 600watt and will it "fire" correctly?
KILLER info in that piece, it also states that lumen depreciation isn't effected by dimming which is another rumor/myth i couldn't prove or disprove.
really appreciate the article!!!
good read. so it appears dimming DOES have an effect on spectrum. seems like its marginal in HPS but quite significant on MH. as well as the dimming percentage and if the bulb is coated. I don't see anyone dimming down to 30% however a 1k is dimmable to a 400 which is a 60% decrease and goes over the 50% threshold for drastic change. so thats some good info right there, don't dim a 1k to 400 (which i have done, and noticed a hum on one of my bulbs which caused me to switch it immediately back to the 600 level but only that one bulb, which i felt was due to the somethin with that bulb as oppose to the dimming system). thanks for the contribution!!!
If you read the article and tables (figure 2) closely, you'll find that because the bulb's lumens per watt efficiency drops along with wattage, it puts out less than half its rated lumens even when still driven at 60%. So you don't need to dial down so far, the bulb has more or less already crossed your 50% threshold for you. The bad news? You're still spending 60% of the power, and running bulbs at such low power settings does accelerate their demise. In fact, after reading that article closely, I would advise against anyone running an MH bulb at any dimmed setting at all, something about how the mix of gases in the envelope can't take it. HPS is much more stable and less prone to depreciation, but it still will if run at very low power settings for extended periods.
I emailed solis tek twice to get their take on this but apparently their ballasts are way better than their customer service,Lol.By the way i received an auto response both times saying they would get right back to me but never heard a thing,almost as if they did not want the liability of answering these particular questions.
OHM'S law only applies for DC voltage. Resistance in DC is static. In AC it is called Impedance and is dynamic based on frequency. Ohms law is Amps=Volts/Resistance, not Amps=Volts/Impedance. While ohms law is true for DC and AC it is impossible to factor in resistance in AC since it changes depending on frequency. And for the color change, that color difference would be seen when comparing a 600 to a 1000 every time. If you dim a 1000 to a 600, the minute color change would be the same if you replaced the 1000 with a 600. I have 2 Lumatek 1000w dimmables and both show a decrease of 7Nm when going from 1000 to 600. When i switch it with a 600W Lumatek digital on full blast its still 7Nm off the 1000 Watt. so while the 600 does show a slight drop, this is not due to the dimming. If i get around to grabbing a 400W lumatek, i'll test the 600 dimmed to a 400 and see the drop compared to a 400 at full blast.(note when i say decrease, Im taking about the location of the peak.)um, ohm's law covers both ac and dc. not sure where you came up with that
1.yes raising light is better..someyimes yah gotta dial it down due to too high heat
dialed down to 50% gives 25% of the oomph of 100% 1kw
my take:it was fun to be able to dial down for new transplants or the odd hot day ..but
losing all the oomph while only losing 50% of the electricity made me feel like NOT doing it again..75% is better but in the end i'd just turn afew 1k's off and maybe rotate them in a heat wave.
but in the end 1kw is better hahaha
ttys,
yes , yes and YES...my cooling strategy is air from outside...it gets too hot...it does nay work
split flower room...swamp cooler..sounds good..not enough room...low ceiling , tall shrubbery..
maybe i can fit one in.
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