Portable LPS

Prune · 4th October 2003, 01:16 AM

Since low pressure sodium is the most efficient light bulb, I've been trying to find portable versions I can use as a flashlight, with no success. There are ones that run on 12V DC but are too large and with too high wattage to be used as a flashlight. Are there any really low wattage LPS bulbs?

purplepeople · 4th October 2003, 01:17 AM

More efficient than white LED?

:)ensen.

Prune · 4th October 2003, 04:17 AM

Are you out of your mind?

white LED: 15-25 lumens/W
halogen: 25 lumens/W
HID (mercury, etc.): 30-40 lumens/W
red LED: 40 lumens/W (there is a special one around 100)
fluorescent: 60-100 lumens/W
HPS: 100-150 lumens/W
LPS: 175-200 lumens/W

4th October 2003, 01:16 AM	#1
Prune Account Disabled Join Date: Mar 2003 Location: Vancouver	Portable LPS Since low pressure sodium is the most efficient light bulb, I've been trying to find portable versions I can use as a flashlight, with no success. There are ones that run on 12V DC but are too large and with too high wattage to be used as a flashlight. Are there any really low wattage LPS bulbs?

4th October 2003, 01:17 AM	#2
purplepeople diyAudio Member Join Date: Mar 2003 Location: London, Ontario, Canada	More efficient than white LED? :)ensen. __________________ Those who claim to be making history are often the same ones repeating it.

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4th October 2003, 04:17 AM	#3
Prune Account Disabled Join Date: Mar 2003 Location: Vancouver	Are you out of your mind? white LED: 15-25 lumens/W halogen: 25 lumens/W HID (mercury, etc.): 30-40 lumens/W red LED: 40 lumens/W (there is a special one around 100) fluorescent: 60-100 lumens/W HPS: 100-150 lumens/W LPS: 175-200 lumens/W