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Higher than normal Efficiency LED lamps

mapj1
This is  big Clive  dismantling  some LED lamps made by Philips, but solely for use in Dubai.

It seems that by using all the good techniques of redundant design, a custom long life, cool running, higher than normal lumens per watt LED lamp has been created.

I personally think Philips own video  is vastly less informative.

I was very interested to hear about these, as here in the UK and I presume the EU we are often assured that be are being sold the most state of the art efficient thing, and really it rather seems we are not.

If you bear with the full 30 odd minutes, (or skip the bit where he is mangling the lamp base with side cutters) you get to  see the internal circuit which includes a rather nice anti-flicker circuit that keeps the LED current constant for changes of a few volts in the mains voltage.

I thought folk here might also be interested to know how they work and indeed that such things exist. Even though we are not allowed to have them of course.

Mike
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    Well the power factor is essentially capacitive, and near pure sine, so if you load all 3 phases equally, the neutral currents still cancel, unlike the spikey waveforms of the switching supplies, so your neutral currents are safe, also EMC ought to be very good.


    Also even if everyone in Dubai, call it 3.3 million folk, had 10 of the 3 watt ones we are still only talking  grand total of 100MW of load and 50MVA r negative - significant of course, but probably swamped by the inductive load of the compressors in all the fridges and air con units.
    A few days ago I thought you were a glamorous film star, with an unusual collection of old switchgear, now a Dubai palace as well, well well...  ?


    I think it is an interesting lesson in how one small Kingdom has enough wealth and influence to change the commercial path, in this case probably for the better - it is the sort of thing that could have been developed for places a bit short on power, like Africa, but  the economics push in the wrong direction of course, which is a pity.

    Meanwhile I have found the Datasheet for them which is pretty comprehensive 

    Mike

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  • 0
    Well the power factor is essentially capacitive, and near pure sine, so if you load all 3 phases equally, the neutral currents still cancel, unlike the spikey waveforms of the switching supplies, so your neutral currents are safe, also EMC ought to be very good.


    Also even if everyone in Dubai, call it 3.3 million folk, had 10 of the 3 watt ones we are still only talking  grand total of 100MW of load and 50MVA r negative - significant of course, but probably swamped by the inductive load of the compressors in all the fridges and air con units.
    A few days ago I thought you were a glamorous film star, with an unusual collection of old switchgear, now a Dubai palace as well, well well...  ?


    I think it is an interesting lesson in how one small Kingdom has enough wealth and influence to change the commercial path, in this case probably for the better - it is the sort of thing that could have been developed for places a bit short on power, like Africa, but  the economics push in the wrong direction of course, which is a pity.

    Meanwhile I have found the Datasheet for them which is pretty comprehensive 

    Mike

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