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you are totally right about electrical knowledge, when it passes through zero there is no power. In the circumstances of HID does not produce any light when pass through 0, you are right because HF passes more than LF during same period of time. but for the light itself, when the moment there is...

I mean the frequency does not determine how much the light output. the suitable freqency match the ballast and bulb, so they running stable.

Hi, AR. The frequency and light output are irrelevent. Normally CMH is suitable for LF, so factory make LF ballast for it. BUT, since material changes and optimized designs, CMH can match up the HF ballast, like the one we have.

The CMH315 has the own designed LF ballast. BUT, from 630 to 1000 CMH, it really depends on whom made the bulb, some factories can only made CMH for LF ballast, the growerschoice CMH1000W could use on HF ballast, i attached the screenshot from their web. Our CMH1000w is designed to use on HF...

The DE bulb i've sent to you is thick quartz shell design, we've tested and it holds the arc tube explosion. If you really need the outer glass shell, dont buy from Growerschoice, cuz the bulb diameter is not same as theirs. find me in conversation if you need extra shell.

we will narrow down the condition of usage, that helps user to avoid accident but not everyone read the instruction and do things properly. Do you still want 315 samples?

the idea is use hps ballast to drive CMH, only change the bulb… save money on a separate ballast

they said because they are unable to design the CMH that can work on HF ballast, also to sell LF ballast is good for their revenue.

if the ballast is crap, even the Philips bulb wont stay in good condition for long. to run the proper bulb with the proper ballast, you can change the bulb every 9-12 months. another option is everything cheap but change every turn.

Im now think about to make a CMH400W in E39 base to let you guys run with HPS ballast(high frequency), sounds good?

same as those CMH315 you can find on the market, PGZX18 base could fit in any CMH315 fixture, similar spectrum as Philips, slightly higher PPF than Philips we have tested. both 3kk and 4kk

hello club members, i have some 315 free samples to sent out for test grow, anyone want to run them?

its a 1100w HPS, so i guess you have to run this on super setting to see its true power

depends on which one you compare to? and dont expect too much on HPS spectrum changes, 'cause it wont.

Non UV version on?

DLC open up a new category for horticultural LED lights, Just want to know how much DLC rebates

hi, anyone know about this?

it depends on PPFD in both blue range and red. Compare a top notch CMH to the best HPS might tell the story.

surely the firing issue will be sorted out before it goes on market, but about the price i dont think there is any chance to bring a 1000W CMH down below $100

you using E series or Classic?