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Mean Well ELG-75-C1050A ELG-75-C1050A-3Y

cree chips(cxb3590) win 23% @ half of the power @ half current it`s even 25% more light efficiency also a 1800K chip is emitting much less green light compared to 2700K and luminous efficiency is not the adequate unit to compare. if we see those chips as an alternative to add red to a cool-...

2 in series means: wire output DC+ to + of your chip then wire from - of this chip to + of the second chip then wire - of the second chip to DC- of the drivers output spent some time to learn the basics in the internet - before yo:ou risk and electrocut your life

above driver is 10W/300mA constant current - and you see 3 x 100W chip with the same driver: this is 5 x 100W chip + 1 x 50W (on the right) ---> only 50mA each chip and i still see good low voltage consistancy Since years i diy with this spectrum (among others) to grow sucessfully...

https://www.aliexpress.com/store/product/5pcs-50W-high-power-led-Lamp-plant-grow-light-full-spectrum-400-840nm-EPILEDS-Chip-32/439311_32847416275.html?spm=2114.12010612.0.0.e6846f11UxIud sometimes they are "called" epileds but on epileds.com.tw - happens the same as we know the only difference...

three of what ? --- do you mean 3 of those^ drivers for 4 x CLU048-1212 ??? then you should use only 2 drivers to drive 2 x 2CLU048 in series. have a look to the datasheet - and you see, that your 4 chips will drive out a total ~ 65W @ 500mA (<20% of max current) very good efficiency and no...

2 or 3 in a row --- if you want higher efficiency wire as many rows in parallel as you like

tell your company that you want to prepare hot water with electricity - and may be they are glad to offer you a special tarif. i use watercooled led light in combination with a heatexchanger and i prepare lots of hot service water every day... 9 yards sound like min.2500W ---> 500L of hot water...

what`s that ???

the cardboard box let the air come in - and the light doesn`t leak outside

:peace: you need negative air pressure (pasive income hole covered eg. with a cardboard box against the light) - pulling out with both fans in a row if necessary. i once had the same problem - and found it much better to put ona gel or other room ambients on a rag inside a bigger plastic bag...

:peace: if you read that vice versa you get the ~ right numbers. led: 25-30% light MH or HPS bulb: 20-25% there will ! never ! be a led chip with 70% light efficiency and today you will be lucky to find a 30% efficiency of the produced light. as i watercool my leds - i know it`s pretty simple...

sorry - this is chinise epistar - never found any professional datasheet of these chips you find this chip everywhere on alibaba and aliexpress eg. https://www.aliexpress.com/store/group/DIY-Grow-Light/2335145_511909490.html?spm=2114.10010108.100008.24.4cbe57892u537H

That`s 3W epistar full-spectrum chip ~ 1800K // 12 in row / 9 paralell (@30W) if you drive them < 100mA - they are pretty efficient like all chips @ ~ 13% of max. load.(700mA) can cost you something like 1,30US$ / W

:peace: I never worked with this driver, but i guess and estimate, that you are hard on the edge...specially with a cold start in the (winter)morning, you risk to see your leds blinking...and your driver is not able to build up enough voltage to drive through 1,75A - normaly it helps to dimm...

i would invert 3 more chips - and drive 2 rows with that driver- to have better light efficiency, heat management and lower Vf.

What`s that ? the exception confirms the rule sometimes the most stupid farmer is harvesting the biggest potatoes... in the sense of "ONENESS" --- GOD is not always clever, smart and fit - but always wins the race somehow.

:peace: - Which mind ? - Which state of mind ? - Is our mind not like an ocean with subconciously flat and deep sea - small islands and big continents forming our concious - always moving the coast + changing color and temperature with the moon and the sun - and always with the posibility to...

i thought he was hindu, but now find him as one of the most popular sufi...born in spain and working and living in the arabien world of the 12th century a.c. ... anyway i like him and give him as a present the following extension: Big Bang is the heart beat of GOD... God sleeps in the rock...

God sleeps in the rock, dreams in the plant, stirs in the animal...and awakens in man. - Ibn al 'Arabi