Underground Station lighting

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farecard
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Joined: Thu Oct 02, 2008 2:40 am

Underground Station lighting

Post by farecard » Fri Feb 22, 2019 10:04 am

I was at Ballston and noticed new equipment atop the HVAC pylons.
It's clearly power supplies for the lighting bouncing off the ceiling.
https://www.meanwell-web.com/en-gb/ac-d ... -185h--48b
It looks like they are replacing older lighting with LED.
I note I did not identify the light as LED; they must have worked to get good multi-spectrum output
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davinp
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Location: Woodbridge, VA

Re: Underground Station lighting

Post by davinp » Fri Feb 22, 2019 11:00 am

Metro needs to repair the one at Capitol South. The lights are not working on 2 of the brown pylons making it dark in certain areas of the platform

wrivlin
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Re: Underground Station lighting

Post by wrivlin » Thu Mar 07, 2019 2:31 pm

Saw them at Court House a few days ago. Doesn't look like they've been turned on yet.

farecard
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Joined: Thu Oct 02, 2008 2:40 am

Re: Underground Station lighting

Post by farecard » Thu Mar 07, 2019 3:24 pm

Did these replace units recessed inside the pylons?

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Sand Box John
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Re: Underground Station lighting

Post by Sand Box John » Thu Mar 07, 2019 8:02 pm

"farecard"
Did these replace units recessed inside the pylons?


Looks like yes. The vapor lamps they replaced were fitted in a cone that was part of the diffuser at the top of the pylon. The reason why these LED luminaries stand proud of the top of the pylon is because of the heat sink on their back side. Those power supplies are mounted on the side of heat sink. I have a couple of salvaged LED street lights, the heat sinks on them are ginormous.
John in the sand box of Maryland's eastern shore.

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