LED - HPS Comparison

Hi Folks!


I just compared my Cree3590 with my HPS 600W (Adjust a Wing) with my iPhone Luxmeter ( Apogee Quantum Meter is not yet delivered to my door) and made a strange discovery:


Cree3590 DB Bin (3500K) Running on Meanwell ELG150 @30cm distance: 6858 Lux
HPS Slyvania 600Watt on Lumatek VSG @ 45cm distance: 61474 Lux

I know, Lux doesnt really count much for plant-growth, but why is my HPS at Plant canopy giving almost 10 times more light?

Or do you think something is wrong with my Cree Setup? I am running them @ 1400mA for better efficiency with one COB per sqft.

Sounds strange to me. I measure 20000 lux from my 100W china led run at 50W at the same distance.(30 cm)
Disclaimer: Yes I know, lux and lumens are for humans.

Rilla.

peregrines said:

Hi Folks!


I just compared my Cree3590 with my HPS 600W (Adjust a Wing) with my iPhone Luxmeter ( Apogee Quantum Meter is not yet delivered to my door) and made a strange discovery:


Cree3590 DB Bin (3500K) Running on Meanwell ELG150 @30cm distance: 6858 Lux
HPS Slyvania 600Watt on Lumatek VSG @ 45cm distance: 61474 Lux

I know, Lux doesnt really count much for plant-growth, but why is my HPS at Plant canopy giving almost 10 times more light?

Or do you think something is wrong with my Cree Setup? I am running them @ 1400mA for better efficiency with one COB per sqft.

Click to expand...

are u running 600W of cree3590's in ur Lux test

You only meassure one COB.

peregrines said:

Or do you think something is wrong with my Cree Setup? I am running them @ 1400mA

Click to expand...

have you measured this? unless youre powering the ELG with 220V its probably putting out ~1050 mA

get a reading from the hps about 18 inches off to one side or the other and see how bad it drops off

I thought LUX meters weren't accurate for measuring LED's ??

HemiGrind said:

I thought LUX meters weren't accurate for measuring LED's ??

Click to expand...

theyre not bad for white leds

HemiGrind said:

I thought LUX meters weren't accurate for measuring LED's ??

Click to expand...

They are fine for white light, not good for red/blue monos.

CobKits said:

have you measured this? unless youre powering the ELG with 220V its probably putting out ~1050 mA

Click to expand...

Put an ammeter on one of those cobs and see exactly what they are getting.

CobKits said:

theyre not bad for white leds

Click to expand...

Cool, thanks for the clarification.

Ya you got something going on there, at 30 cm I got 37-39,000 LUX I am using 3590-3000k bd 90cri running at 1.05 amps , 11 cobs and a total of 428ish volts