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LED Tubes on the 36W T8 preheat battens, in the parking lot of the Cinemall mall

LED Tubes on the 36W T8 preheat battens, in the parking lot of the Cinemall mall

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The LED tubes that retrofits linear fluorescents, reached to Israel.
Not expecting that these tubes will last for long.

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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:370 KB
Date added:Mar 22, 2012
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Date Time:2012:03:22 19:14:30
DateTime Original:2012:03:22 19:14:30
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SeanB~1
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Mar 22, 2012 at 02:10 PM Author: SeanB~1
Add to that these retrofit tubes are incredibly expensive as well. One costs as much as a box of good lamps and starters.
Ash
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Mar 22, 2012 at 02:24 PM Author: Ash
I dont see much of a problem with using LEDs here. The effect from them vs well installed T8 fluorescents is about the same

The fluorescent installation here had 2 probles to begin with :

- The ceiling is made of concrete and is dark - It does not reflect much of the light. Fixtures with reflectors should have been used here, but instead they put up cheaper plain battens

- The lamps they put in were low mercury, and about 1/2 of them were mercury starved for years giving just pink glow, little maintenance

They expect better lifetime (so lower maintenance) with the LEDs. But they forget something more :

This is a car park. The cars emit dirt that settles in a dark layer on the fluorescent or LED tube or on the fixture. So if they want to have sufficient light output, they should clean the fixtures yearly or so

This is also one reason why the light levels here were quite low - The lamps and fixtures were too dirty

If they have to get up to each fixture once in a year for cleaning, then relamping is not more complicated anyway. And i expect good fluorescents and good LEDs to have comparable lifetime (to EOL / to critical light output deprecation respectively)
dor123
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Mar 22, 2012 at 02:45 PM Author: dor123
Ash: The lighting levels here wasn't so low, and only several of the tubes were mercury starved. Most of my pictures of mercury starved tubes, are in fact of the same lamp. There were only few lamps that were mercury starved.

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 230-240V, 50hz country.

Ash
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Mar 22, 2012 at 03:38 PM Author: Ash
If the installation is too bright to begin with, you can remove starters or lamps which are redundant. It saves energy quite well and does not cost anything in materials

The setup there is not maintained well - A lot of lamps were mercury starved for years (at least on the bottom floor), and the fixtures so dirty that significant amount of the light was just not getting out

1 clean lamp that gives full light, is better than 2 dirty lamps that give 1/2 the light each. So maintenance is important here
dor123
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Mar 23, 2012 at 01:34 AM Author: dor123
The fluorescent fixtures here, weren't so dirty. The light wasn't too bright in the parking lot with the fluorescents. The LED tubes actually looked even brighter than the fluorescent and still no overlighting.
I don't know what is the maintenance level in the parking lot of the Cinemall. It have several floors.

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 230-240V, 50hz country.

Ash
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Mar 23, 2012 at 02:09 AM Author: Ash
It is hard to tell the amount of thin layer dirt (as is the dirt from cars emissions) when looking at a lit lamp, but it can very significantly drop light output
dor123
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Mar 23, 2012 at 02:53 AM Author: dor123
You should really enter to that parking lot, in order to see what is the level of the dirty on these fixtures. In the dark, when the light are on, the camera have problems to see the dirt.

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 230-240V, 50hz country.

Ash
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Mar 23, 2012 at 03:06 AM Author: Ash
You have to compare clean and dirty lamp side by side, or clean 1/2 of the lamp to see the difference. The dirt is thin and even so it is invisible on 1 lamp
dor123
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Mar 23, 2012 at 03:44 AM Author: dor123
Ash: Only visible dirt, can drop the lamps brightness.

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 230-240V, 50hz country.

Ash
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Mar 23, 2012 at 03:51 AM Author: Ash
Not at all. It is not invisible because it is transparent, but because it is even - You see a lit lamp, and it appears quite bright (on the backround of the dark concrete and dirty fixture), so it apppears normal even if its giving 1/2 the light
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