Samsung LM301B diodes - 306 pieces in each of 8 light rails.
Osram 660nm chips - 12 pieces in each of 8 light rails.

Light Source - LED
Spectrum - full spectrum
Light Output PPF - 1820µmol/s
Efficacy - 2.8µmol/j
AC Input Power - 650w@120V AC 635w/240V AC
AC Input Voltage - 100-277V AC,277-480VAC (Optional)50/60Hz
Light Distribution - 120°
Mounting Height - 12“ - 36” (30-90cm) Above Canopy
Thermal Management - Passive
Max Ambient Temperature - 95°F / 35°C
Dimming - 0-10V / PWM(0-100%)
Total Harmonic Distortion (THD) - 50,000hrs
IP Rating - IP65
Certifications - CE RoHS FCC, Wet Location
Warranty - 5 Year Standard Warranty
Dimensions - 44”x44”x3”