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GRRRRRRRRRRRRRRRR!!!!!!!!!!!!!!!!!!!!!!!!!!!

GRRRRRRRRRRRRRRRR!!!!!!!!!!!!!!!!!!!!!!!!!!!

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All of the daylight halophosphors T8 in the parking lot in the Cinemall mall, were gone and replaced by LED tubes in their preheat battens.
The former T8s, was better, and most of them, were good.
The overall light in the parking lot, remained unchanged, but the LEDs are much glary.

IMG_0906[1].jpg IMG_0902.JPG IMG_0901.JPG IMG_0899~0.JPG

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Album name:dor123 / LED lighting (Except road lanterns), LEDs in general, lasers, flashlights and other lighting gadgets
Keywords:Lamps
File Size:223 KB
Date added:Sep 20, 2012
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rjluna2
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Robert


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Sep 20, 2012 at 11:56 AM Author: rjluna2
I know what you mean, dor123. I have ridden on MARTA CQ312 class car with this glary 5000K LED 'fluorescent light' refit.

Pretty, please no more Chinese failure.

dor123
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Sep 20, 2012 at 12:26 PM Author: dor123
In the picture of the interior of the CQ312 coach of the MARTA light tram, I don't see any glary LED tubes.
I uploaded two more pictures of new LED lighting.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230V, 50hz country.

rjluna2
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Sep 20, 2012 at 02:07 PM Author: rjluna2
These pictures at Wikipedia is the older one. Some tram such you mentioned have those pukey 5000K color temperature LED 'fluorescent light' refit was recently installed this year.

Pretty, please no more Chinese failure.

dor123
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Sep 21, 2012 at 12:24 AM Author: dor123
I think that the moving to LED and CFLs, is only because it is the "Next generation of lighting", while ignoring its disadventages.
In general lighting appliactions, all of the adventages of the LED, aren't realised.
Btw, regarding to backlighting of LCD screens: Xenon excimer CCFL backlit LCD displays, would be much more greener to the environment than LED backlit LCD displays. Not only they will have no mercury like the LED backlighting, there will be also less electronics and no other hazarodus materials that LEDs have and CCFLs no, and the displays will be more reliable, as they will be thicker (The thinnest, the least reliable).

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230V, 50hz country.

Danny
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Sep 21, 2012 at 07:17 AM Author: Danny
Bleuuurrrghhh
Ash
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Sep 21, 2012 at 07:59 AM Author: Ash
Same amount of light as long as the LED tubes are clean. Wanna see that after a few years with the tubes dirty from the exhaust pollution from the cars. No wonder they had little light with the old tubes, all they needed was to wipe them clean



As for LCD backlights. LED backlights are more reliable then CCFL (any) :

The power of LED is small (its there to backlight a screen and not to light a room), so no overheating issues of the LEDs. Its among the few places that pass my "quick check" whether LEDs are appropriate : amount of power/surface (which means how hot the LEDs will be) is very low in this application, less than any LED device used for room lighting

The LED strip needs just PWM driver, it is more reliable than CCFL ballasts as it is simpler (no CCFL driving circuit is required), no high voltages present (no OCV breakdown issues, no stuff blowing up at lamp EOL or failure to strike ....), and the actual power in the circuit is lower (as LED are more efficient in providing directional light)
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