50W HID = 50,000 Lumen???

mattheww50

mattheww50

Flashlight Enthusiast
Joined
Jun 24, 2003
Messages
1,048
Location
SW Pennsylvania
Have you guys seen this one? Is this guy a CPF'er???

http://usualsuspect.net/forums/showthread.php?t=226287

Regards,
Flavio
BugoutGearUSA.com

Other than the fact that such a light would have to be about 200% efficient, no problem. The highest lumen output per watt are large Low Pressure Sodium, which can get to about 250 lumens/watt. A 100% efficient conversion only produces about 500 lumens per watt IIRC, so 1000 lumens per watt is absurd.

The reality is a 50 watt HID is unlikely to exceed 100 lumens/watt, big ones (400 and 1000 watt HID's) can do a little better. So figure the real output of the 50 watt HID is not likely to exceed 5000 lumens.
 
XeRay

XeRay

Flashlight Enthusiast
Joined
Feb 3, 2006
Messages
1,309
Location
Ogden, Utah
Other than the fact that such a light would have to be about 200% efficient, no problem. The highest lumen output per watt are large Low Pressure Sodium, which can get to about 250 lumens/watt. A 100% efficient conversion only produces about 500 lumens per watt IIRC, so 1000 lumens per watt is absurd.

The reality is a 50 watt HID is unlikely to exceed 100 lumens/watt, big ones (400 and 1000 watt HID's) can do a little better. So figure the real output of the 50 watt HID is not likely to exceed 5000 lumens.

A quality D2S or D1S (GE, Philips or Osram) bulb driven at 50 watts produces ~106 lumens/watt. At 35 watts the efficiency is about 91 lumens per watt.

It has already been determined over there, that the number was off (50K) by a factor of 10 (10X)
 

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