Luma or marshydro fc

Okay, the lumaatek site loaded.. onyl the pro 2,9 series would be comparable to the FC series lights. BAH no nono to zeus... lumileds .. some knockoff LED fuck that. only if it's half the prie. omg the price they want is insanely high for the 450w and i'm sure the 600w too. holy shit.. fuck that noise. Same or better quality and much better prices on the FC series... also, think it's a bit warmer CCT, which i prefer. and, genuine samsung diodes vs some knock-offs that are guarnateed to be lowest bin possible, bc that's what you license out to 3rd party companies if you are samsung.. always get the dumbed-down recipes licensed out. general info Efficacy is bigget key. but also the chip maker. if third-party they don't get the design for best chips. they can still be a legit high-efficacy, but what other corners were cut in manufacturing those lumileds? Daily Light Integral is best way to communicate about this stuff. hours of use and area of coverage are baked into it. it is apples to apples. 35DLI for you is 35DLI for me. local environment will impact how much you or i can give. Whether oyu have ambient or added co2 may make a differenec in choice too. figure 35-40 DLI for ambient co2 and 50-60 DLI for consistently maintained 1300ppm co2 levels and push higher in that 50-60 if you more tightly control temps and RH. Carbon is your limiting factor to growth. use a DLI table to work backward from hours of use - this gives you "ppfd." multiply PPFD by area of coaverage in meters-squared and that's the umol/s you want to be produced from a light you buy, roughly (ballpark idea not written in stone for max you can give). i have a folder with useful charts and such, including a dli spreadsheet in my good drive link on my GD profile. click my avatar, sort by date. it'll be at top. ignore the min/max page on the dli chart spreadsheet, it shouldn't be there. it's too high for ambient co2. (43 dli) Read up on DLI on the wiki page. it's got good info. Okay, the lumaatek site loaded.. only the pro 2,9 series would be comparable to the FC series lights. The FCE series had bridgelux chips - slightly less efficient, slightly cheaper. i haven't looked at that price difference lately, but the nicer diodes are worth it, imho. Unless cost is significantly different or you are getting the FCE for free etc... go with FC-series. Anyway, shoot for 40DLI and you'll be able to give the max light your environment allows with ambient co2. if you have to dim, it'll be no more than 5-10% or maybe an extra inch of distance from canopy would be enough. This is only a good thing. As all lights dim over time, you can mitigate this over 50,000 hours of use (50k hours is typically the point it is 90% of original intensity if run at samsumg spec sheet amps and volts, whic fc series does and likely the zeus does relative to lumileds specs i bet.) you only get that 50k hours of use if near spec sheet testing parameters. check out lm301b on samsung com. good read. anything run 'hotter' loses longevity and dims faster. they have longevity curves for 0,25w per diode and 25C temps on diode. any more watts or higher temps means less longevity. not trying to scare, but worth putting a fan over the light even though it isn't needed. might get you another year of solid use. Talking 7 years if used year round and if oyu only do a cycle or 2 per year, it'll last 2-4x as long, lol.. i've got lights that i only put a couple thousand hours per year... they will last me 2 decades.