A Comparison of Lumen Output at Common Wattages

Tonight I wanted to see just how close most of the popular COBs are in terms of lumen output at various wattages, so I punched some numbers into the manufacturer product selection tools and compiled a list. All results are calculated at a case temperature of 55 degrees Celcius (except for the Luminus CXM-22, for which I estimated Tj to be 85 degrees in order to have a case temperature as close to 55 C as possible). A color temperature of 3500K and 80CRI was used for every COB.

Here’s what the product tools turned up, sorted by lumen output:

@25 Watts

Voltage (V) Current (mA) Lumens
Cree CXB3070 BB 33.4 750 4,325
Citizen V5 CLU048-1818 48.8 510 4,207
Bridgelux Vero SE 29-D 34.3 730 4,190
Luminus CXM22 Gen 3 48.6 515 4,179
Citizen V5 CLU048-1212 33.9 735 4,127
Cree CXB3590 CD No Data No Data No Data

@50 Watts

Voltage (V) Current (mA) Lumens
Cree CXB3590 CD 34.5 1450 8,081
Citizen V5 CLU048-1818 50.5 990 7,937
Bridgelux Vero SE 29-D 35.7 1400 7,863
Luminus CXM22 Gen 3 51.1 980 7,640
Cree CXB3070 BB 35.2 1400 7,509
Citizen V5 CLU048-1212 35.9 1395 7,427

@75 Watts

Voltage (V) Current (mA) Lumens
Citizen V5 CLU048-1818 51.9 1445 11,296
Bridgelux Vero SE 29-D 37 2025 11,095
Cree CXB3590 CD 35.7 2100 10,935
Luminus CXM22 Gen 3 53.2 1410 10,598
Cree CXB3070 BB 36.6 2050 10,219
Citizen V5 CLU048-1212 37.4 2000 10,176

@100 Watts

Voltage (V) Current (mA) Lumens
Citizen V5 CLU048-1818 53.2 1880 14,360
Bridgelux Vero SE 29-D 38.2 2620 13,998
Luminus CXM22 Gen 3 55 1,820 13,232
Cree CXB3590 CD 36.7 2700 13,034
Citizen V5 CLU048-1212 38.6 2590 12,647
Cree CXB3070 BB 37.9 2650 12,369


I suspect that if data was available under 1400mA for the CXB3590, it would be at the top of the 25 Watt list. That being said, it looks like the CXB3590 is king at 50W and below, but the Citizen 1818 takes over once power increases past this point, with the Vero 29 close behind. Seeing as it ranks either first or second throughout the 4 power levels, the CLU048-1818 appears to be the most versatile of the bunch – the V6 1818 is likely even a little brighter too. I look forward to Citizen releasing the new product selection tool for the V6 series to find out.


  1. Are the Veros Gen6 or Gen7?

  2. Thanks for the numbers. Citis numbers are open question to me, would be perfect to see real uMoles. Anyway, the lumens show why went with 048 1212, with a very simple rule: with 36v and a PAR goal take two 048 instead 1 3590. You will get better efficiency. More mountings needed but angles and hot spot (canopy and cooling) avoiding come in the package and that by half the price in Europe (2×11 vs 45+ Eur for the cobs).

    • LEDGardener

      April 1, 2017 at 9:17 am

      Yeah, instead of buying say 4 CXB3590, you could underdrive 8 CLU048-1212 and get far better coverage and great efficiency. Even when you factor in the cost of extra heat sinks, it’s probably still cheaper! I’m going to be building my own quantum board shortly as well (just ordered some parts last night), we’ll see how that stacks up for the cost.

  3. I would just use vero 29 v7 C 69.4v or citizen 1825. You used top bin on everything else except the veros. I am building a 8 or 9 cob for testing in a 4×4. I am going to run the 8 with 2 drivers@700m pushing 400 watt. Then I am going to test with 9 in a 4×4 with 2 drivers@700m pushing 500 watts. I want to see what reading I get from my 520 quantum sensor. I have built a 2 cob vero 29 light pushing 100 watts a cob and it was putting out 468.5 micromole at 24 inches. I have also built a 4 cob cxb 3950 cd @1050 and it was pushing 568 at 24 inches. I was impressed. I swear this is the future of growing. Very cool website.

    • LEDGardener

      October 29, 2017 at 4:25 pm

      I suppose, the Veros don’t really have a “bin” though hey? Please share your results on the forum once you get the data – I’d love to see it!

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