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QB304 Quantum Board

304 LM561C Top Bin

$ 75.00

QB304 Quantum Boards

High efficiency boards designed for DIY projects. Can be powered from 10 to 150 watts. Ideal for use in grow tents or grow area with reflective walls and grow spaces with limited height. No TIM is required.


  • 304pcs Samsung 561C top bin Diodes
  • Connectors rated 300V 9A
  • Estimated LER 321.60 lm/W
  • Estimated QER 4.86 µmol/J
  • Dimensions 6.833" x 11.25
  • Max current per board 1600mA

Designed by Horticulture Lighting Group

Voltage  (Min Vf dc) Voltage  (Max Vf dc) Current (mA) Watts at Board (Min Watts) Watts at Board (Max Watts) Max Lm/W at Board (40C) Min Lm/W at Board (40C)
100.7 104.5 250 25.17 26.12 195.7 188.8
101.8 105.6 350 35.64 36.97 191.4 184.6
103.3 107.1 500 51.68 53.58 184.8 178.3
105.2 109 700 73.68 76.34 178.1 171.8
108.3 112.5 1050 113.71 118.1 167.5 161.5
111 115.1 1400 155.34 161.19 158.8 153.2


* Voltage calculated using sample board. Voltage may be +/- 4% for boards in different batches.

** Min values calcualted using AZ Voltage Bin, Max values calcualted using A1 Voltage Bin

** For more details refer to Calculator here. Use values LM561C, 3000K, 80 CRI, AZ or A1 Voltage Bin, S5 Flux bin. # of LED as 304x (number of boards). Change IF_Drive mA to see lm/W and flux for different power.

May require an Aluminum plate or heatsink if running 50+ watts. Heastink requirements depends on application and power.


Note for Parallel Wiring

All boards are tested at 700mA and a test Vf is written on boards.
For circuits with multiple parallel boards on single driver it is best to group and use +/- 0.1Vf boards together to ensure they share current equally.
For series or single driver per board matching Vf is not important.
If you re-order boards to mount them in parallel with old boards you bought, give us this Vf number in checkout notes so we can give you boards with similar voltage.


Optics Notes

LEDiL Florence



Related Product

Pre Drilled Heatsink

Aluminum Heatsink


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