Horticulture Lighting Group 260 Watt XW Quantum Board LED Kit V2


2 Ultra High Efficiency QB-288 V2 (Version 2) or QB-304 Quantum Boards.

NEW - QB-288 V2 Quantum Boards Now Shipping!

Equivalent to a 500 Watt HPS, two of these will replace a single ended 1000 Watt HID grow light. Three of these kits equal a double ended 1000 Watt HID! 

The 260 XW is the same as the 260 Watt kit but with a different board layout and a larger heatsink. Works great in a 4' x 4' for veg or a 3' x 3' for flowering.

The HLG 260 watt XW kit with new Version 2 Quantum Boards, a total of 576 Highest Bin Samsung LM301B LED's, is the most efficient grow light kit on the market. Enjoy lower energy cost, less heat and more output, a 7% efficiency gain over the previous model!

 - "All the parts needed to build your own high performance LED grow light is included in the kit."

General Spectrum Info:

3000k - Great for Flowering and General Use.
3500k - Great for Flowering and General Use.
4000k - Great for Vegetative Phase or as a Primary Veggie Light.

2700k - Great for a Primary Flowering

Custom configurations are available upon request, just contact us with your configuration.


  • Driver Adjustable from 135-285 Watts
  • Veg Footprint: 4’ x 4’
  • Recommended Flower Footprint: 3’ x 3’
  • 2 Kits Equal the Output of a Single Ended 1000 Watt HID!
  • 3 Kits Equal the Output of a Double Ended 1000 Watt HID!
  • Dimensions: 19.75" x 12.5" x 3"
  • 1 Year Warranty


  • 2 QB-288 V2 or QB-304 Boards with Samsung LM561C S6 (QB-304) or 301B (QB-288 V2) Highest Bin Diodes
  • 1 Slate 6 Double Predrilled Heatsink, 501mm x 320mm
  • Meanwell HLG-240H LED Driver. Boards Should Be Wired in Series with the Driver for Maximum Output
  • 8FT Nema 5-15P 16/3 SJTW NA Power Cord or Equivalent for Standard 120VAC
  • 1 AC Cable Joiner - IP68 (Water Proof) for Power Cord to Driver's AC Connection
  • 3' Solid Core Wire
  • 2 Wago Connectors for DC Wiring
  • Hanger Clips


  • QB-304 - Lamp Efficacy with S6 Flux Bin 2.33 µmol/J, 162Lm/W
  • QB-288 V2 - Lamp Efficacy: 2.47 µmol/J, 170Lm/W 
  • QB -88 V2 - Board Level Efficacy: 2.63 µmol/J, 181Lm/W


No Thermal Interface Material is required between the LED board and the heat sink.

Remove the black plug on top of the driver and use a small Philips head screwdriver to adjust the power.

LED Driver color wires


Molex Lite Trap

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