The QB120 V2 from HLG UK/EU is a high-efficiency, full-spectrum Quantum Board ideally suited for small grow spaces with height limitations. Built around 120 top-binned Samsung LM301H LEDs, this board can be powered up to 70 watts while delivering exceptional performance in a compact 280 × 240 mm form factor. Designed for passive cooling, it doesn't require heat sinks or thermal paste, making it a clean and clutter-free option for DIY grow setups. At typical operating currents (2.5-2.8 A), the board draws 57-64 W, with photon efficacy ranging from 2.66 to 2.7 µmol/J. This board is especially well-suited for vegetative growth, clone, or supplemental lighting, and is easy to integrate via Molex daisy-chain connectors, supporting both series and parallel configurations with other QB120 boards. But if you’re thinking about another more powerful or a different lighting system, then check out the HLG 300 V2 Rspec or even the HLG 550 V2 Rspec.
