How many Lumens for a 400watt Metal Halide and what is the LED equivalent
GE Lighting 22121 Halogen Bulb, 250-Watt, 4000-Lumen, Tubular T2.5 Shape, Recessed Single Contact R7S Base, 1-Pack - - Amazon.com
How to Convert Lumens to Watts? - LedsMaster LED Lighting
GE Lighting PAR38 Warm White Halogen Flood Light Bulbs, Indoor and Outdoor, Dimmable Spotlight, Energy Efficient, 80-Watt, 1600 Lumen, Medium Base, 2-Pack - - Amazon.com
Lumen en kleurtemperatuur - Verlichtingpaleis
Lumens to Watts: The Key to Buying Replacement Light Bulbs - Ideas & Advice | Lamps Plus