How about....cold area, battery backup high bays?

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gorms400

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I'm currently working on a cold storage freezer warehouse, 100k sq ft of -10 to 0 degrees F. We are installing conventional 400w high bays for general lighting, I'm trying to find/talk the owner into some battery backup lighting to take care of emergency lighting. We pulled a constant 277v circuit to every fixture location in case of this. No generator on site, so it's either a battery backup fixture or pipe a whole bunch of remote heads from battery units in the electric room. Has anyone seen a battery backup high bay that works in these temperatures?

FWIW the freezer is already getting down to around freezing for the next few days, poor planning, so that's why I suggested an LED or induction lamp high bay with backup capabilities. Thanks for any suggestions!
 
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Barbqranch

Barbqranch

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Not the same situation, but I was involved w/ a battery backup burglar alarm in an unheated building where 1 and 2 day power outages were common. Only way we could keep battery power w/o a huge battery was an insulated, heated (to 65 degrees F) box. Rechargeable batteries really lose capacity in low temperatures.
 
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gorms400

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I've seen 2 head units before with a little heating pad right under the battery made for "unheated" areas so I wasn't sure if they made something like that for a high bay light, even if it was a t5 or LED. Looks like we're going to use remote heads and battery units in the machine room and spread out remote heads over the 100k sq ft, which I'm not crazy about.
 
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GoldDigger

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gorms400 said:
Looks like we're going to use remote heads and battery units in the machine room and spread out remote heads over the 100k sq ft, which I'm not crazy about.
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If the remote head wiring is 12V, be sure to do a voltage drop calculation, since the low voltage DC is more sensitive to a drop of the same number of volts than system AC voltage circuits are.
For a run of several hundred feet you may need some pretty big wire, especially if you are trunking the DC and then splitting it to individual heads.
 
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