Description
QB-75 v2 (LM301B)
3333K spectrum is an all-rounder veg/flower.
The QB-75 is a classic in the Growopz lineup. Compact, high-efficiency board that consistently performs.
Comes with fan to keep it running cool, and ratchet pair.
Performance & Efficiency
Built around 144 × Samsung LM301B diodes.
Diode efficiency: up to 3.03 µmol/J (~224 lm/W) at low current
Operating current: ~0.172A per diode at 75W
Board efficiency: ~187 lm/W
System efficiency (with driver): ~172 lm/W
Real-world output: >2.4 µmol/J
Runs on a Mean Well XLG-100-24-A (92% efficient) driver.
Notes
Proven long-term reliability
Simple, solid design
Good efficiency per watt
Use Cases
Small grow spaces
Supplemental lighting
Veg or early flower
Efficient, low-power setups
