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Turning on the 2x28W T5 troffers, at the kitchen of the medical storage of Carmel hospital

Turning on the 2x28W T5 troffers, at the kitchen of the medical storage of Carmel hospital


They takes longer time to preheat the electrodes.
But I don't know why they preheats bright than dims down before starting.

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Date added:Jun 20, 2019
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Lightingguy1994
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Jun 20, 2019 at 04:41 PM Author: Lightingguy1994
Are they electronic ?

Going to guess that the ballast firsts activates its preheat circuits for a second, then it activates the arc voltage into the tube and when it does that, it causes power to be taken from the preheat circuit causing it to dim. Kind of like when my air conditioner turns on it causes lights on the same circuit to dim slightly for a moment. Not sure if this phenomenon occurs in 220v countries

Nice fixtures here, i like the style. wish I could get some like that, id stick T12 in it

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dor123
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Jun 20, 2019 at 11:09 PM Author: dor123
These are 28W T5 fixtures, and they have programmed start electronic ballasts respectively.
There is no relation between the lamps electrodes preheats bright than dims down to the A/C dims the lights when it turned on (Which occurs also here in Israel). I think British and European members of LG will know better about this.

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.

Lightingguy1994
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Jun 21, 2019 at 10:23 AM Author: Lightingguy1994
Oh yes I forgot the T5 are shorter in length.

I mean that it could be possible the preheat part of the ballast dims when the main part of the ballast kicks on and draws some power away from the preheating causing that dimming

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Dan The Bulb Man
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Jun 21, 2019 at 10:55 AM Author: Dan The Bulb Man
Yes I also like the style of them. I don't know if I'd call them troffers though, they seem more like surface mounted louvers to me.
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