"【 High-Efficiency Energy Saving Plant Light】only 300 watts true output with 684 PCS LEDs, more scientifically and energy-efficient! Perfect for 3' x 5' (90cmx150cm)' Veg stage, 2' x 6' (60x120cm) Bloom stage, higher intensity in a MARS HYDRO grow tent."
That's from the Mars website, genius. So...