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led lights (Read 2790 times)

benella GDPR opt-out	led lights Oct 29^th, 2011, 9:07pm how many 5 w mr16 led can you power on a 60va /12v toroidal tranformer.
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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: led lights Reply #1 - Oct 29^th, 2011, 10:18pm I've seen 4W LEDs rated 5VA. On that basis I guess a 5W LED could be around around 6.5VA so a 60VA transformer should be ok for 9 LED.
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CWatters

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"Daddy fick it" says James

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Re: led lights
Reply #2 - Oct 29^th, 2011, 10:28pm

Oops looks like the power factor could be worse..

http://apps1.eere.energy.gov/buildings/publications/pdfs/ssl/mr16_benchmark_11-0...

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..testing to date, power factors for LED MR16 replacement lamps have ranged from 0.57 to 0.77, with an average of 0.63,

On that basis might be safer to go with 60x0.57/5= 6

Perhaps see what others think.

« Last Edit: Oct 29^th, 2011, 10:30pm by CWatters »

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benella GDPR opt-out Total Thanks: 58 For This Post: 0	Re: led lights Reply #3 - Oct 30^th, 2011, 11:41am ok, thanks for the reply.
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