220v LED fixture on 120v?

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  #1  
Old 09-17-15, 04:03 PM
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220v LED fixture on 120v?

I bought a LED fixture from China for almost nothing; figuring if it works out I would buy more.
The fixture is marked "220v 50hz." The power supply inside is marked "170-260Vac 50/60hz."

I am fine with it being dimmer than it should be, but will it work at all on 120v?
 
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Old 09-17-15, 04:08 PM
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Can you show a picture of the power supply or a model number? Usually "Universal" input power supplies are 90-240VAC @ 50/60Hz
It may work but that depends on how the power supply is made
 
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Old 09-17-15, 04:36 PM
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Power supply says:
Natsen LED Power Supply
Model NTS 7X1W
Load:4-7W Output 15-25Vdc 300mA+-5%
Ta:20...45C Tc:65C Input:170-260Vac 50/60HZ

There is also some Chinese, but it is too blurry to read.

Thanks.
 
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Old 09-17-15, 04:42 PM
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If it's an electronic power supply then it will probably not operate correctly at 120v.
You could purchase a 120v ---> 12vdc power supply for a few bucks.

AT 4-7 watts of power consumption it must be a small light.
 
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Old 09-18-15, 03:28 PM
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I went to complain to the vendor and found they described it as 220v; so I guess it on me.

Having nothing to lose, I connected it to 120v and it seemed to work fine.
Is it safe to use? I don't care if it fails, I just don't want it to burst into flames.
 
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Old 09-18-15, 03:42 PM
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Using it on a lower voltage then it is intended for should not cause a catastrophic failure. Just may not be as bright as you guessed. Check it after a couple of hours just to see if it seems unusually hot.
 
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Old 09-19-15, 07:30 AM
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I tested the power supply temperature as follows.
Start 77
2 min 81
10 min 97
1 hour 108
2 hour 120
4 hour 114
14 hour 114

Obviously the fact that it lasted 14 hours (when I unplugged it) is a good sign.
120 doesn't seem terribly high; is that reasonable?
 
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Old 09-19-15, 08:20 AM
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No smoke trying to escape and a steady temp at 14 hours is a good sign in my book.
 
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