areze is wrong and always will be
i have been at it for 3 hr to day back and forth
but areze will not give up
this is a DIY
thank you liveforphysics plz keep it coming
thank you seawandrr
this is what he think is fact / logic
http://reefcentral.com/forums/showthread.php?s=&threadid=1538145&perpage=25&pagenumber=3
'""Originally posted by areze
I think its time for hard numbers to put this to rest...
http://en.wikipedia.org/wiki/Luminous_efficacy
Lighting type lumens/watt efficiency
xenon arc lamp 30â€"œ50lm/w 4.4â€"œ7.3%
metal halide lamp 65â€"œ115lm/w 9.5â€"œ17%
end of game, you barking up a dead end trying to use xenon lamps.
want to know why we dont use MH in cars? too sensitive to vibration, they wouldnt be reliable. they also have a significant warm up period for automotive use.
just for fun
white LED 10â€"œ100 1.5â€"œ15%
I want to mention that the spectrums that we work with for both xenon and MH are closer to the bottom of the lm/w range. for LEDs, 10 is for 5mm LEDs, 100 is low voltage cree XRE, in reality a PFO solaris is probably in the 90lm/w range. """""
so he skimmed wikipedia
a thought the hid kits LFP is using are xenon arc lamp
but they are mh with xenon gas to make the fire faster / cold weather
look what i found from your link
http://en.wikipedia.org/wiki/Headla...9_light_sources
HID stands for high-intensity discharge, a technical term for the electric arc that produces the light. The high intensity of the arc comes from metallic salts that are vapourised within the arc chamber. These lamps are formally known as gas-discharge burners, and produce more light for a given level of power consumption than ordinary tungsten and tungsten-halogen bulbs. Because of the increased amounts of light available from HID burners relative to halogen bulbs, HID headlamps producing a given beam pattern can be made smaller than halogen headlamps producing a comparable beam pattern. Alternatively, the larger size can be retained, in which case the xenon headlamp can produce a more robust beam pattern.
Automotive HID lamps are commonly called 'xenon headlamps', though they are actually metal halide lamps that contain xenon gas. The xenon gas allows the lamps to produce minimally adequate light immediately upon powerup, and accelerates the lamps' run-up time. If argon were used instead, as is commonly done in street lights and other stationary metal halide lamp applications, it would take several minutes for the lamps to reach their full output
so a metal halide lamp 65â€"œ115 [23] 9.5â€"œ17%
and a HID headlamp burners produce between 2,800 and 3,500 lumens from between 35 and 38 watts of electrical power
that 80--100