Comparison of Light Efficiencies Between High Intensity Discharge (HID) and Light Emitting Diodes (LED) Lights | PDF | Incandescent Light Bulb | Light Emitting Diode
ANSI/IES LM-51-20 - Approved Method: Electrical and Photometric Measurement of High Intensity Discharge Lamps
Exclusionary Mogul (EX39) - Metal Halide Lamps - High Intensity Discharge | Energy Avenue