the whole room is 13 x 16 The COB CALCULATOR
here is cree
CXB3590CD36V3500K 16 COBS @2.1A ON 5.88 PROFILE HEATSINK
24 SQ.FT. CANOPY 92% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 1314.13
Cobs power watts: 1209
Total voltage forward: 576
Total lumens: 194722
Total PAR watts assuming 10% loss: 541
Total PPF: 2515.65
PPFD based on canopy area: 1121.56
PAR watts per sq. ft.: 22.54
Cob efficiency: 49.71%
Power watts per sq. ft.: 50.38
Voltage forward per cob: 35.97
Lumens per watt: 161.06
Heatsink riser thickness / number of fins / fin's length: 0.27in/14/1.0in
Heatsink area per inch: 260.01 cm^2
Total heat watts: 608
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 281 inches
Heatsink length active cooling @40cm^2/heatwatt: 94 inches
COB cost dollar per PAR watt: $1.41
Electric cost
@12/12 in 30 days: $47.81
Electric cost @18/6 in 30 days: $71.46
Cost per cob: $47.62
Heatsink cost per inch cut: $1.74
Total cobs cost: $762
Total heatsink passive cooling cost: $489
Total heatsink active cooling cost: $163
Here is citizen
Citizen.1818C4.3000K 12 COBS @2.1A ON 5.88 PROFILE HEATSINK
24 SQ.FT. CANOPY 92% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 1479.35
Cobs power watts: 1361
Total voltage forward: 648
Total lumens: 187818
Total PAR watts assuming 10% loss: 516
Total PPF: 2507.76
PPFD based on canopy area: 1124.72
PAR watts per sq.ft.: 21.5
Cob efficiency: 42.14%
Power watts per sq.ft.: 56.71
Voltage forward per cob: 54.0
Lumens per watt: 138.0
Heatsink riser thickness / number of fins / fin's length: 0.27in/14/1.0in
Heatsink area per inch: 260.01 cm^2
Total heat watts: 787
umol/s/W / CRI: 4.86 / 80CRI
Heatsink length passive cooling @120cm^2/heatwatt: 363 inches
Heatsink length active cooling @40cm^2/heatwatt: 121 inches
COB cost dollar per PAR watt: $0.75
Electric cost
@12/12 in 30 days: $53.76
Electric cost @18/6 in 30 days: $80.38
Cost per cob: $32.08
Heatsink cost per inch cut: $1.74
Total cobs cost: $385
Total heatsink passive cooling cost: $632
Total heatsink active cooling cost: $210