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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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    Chris Pearson:

     . . .

    Yes, but consider for a moment the The Road Vehicles Lighting Regulations 1989. A vehicle first used before 1 April 1986 must have headlights with a minimum power of 30 W (dipped and main beams). That presents a problem with LED lamps and since 1 Jan this year, LED conversions are an MOT fail. There is no specific requirement concerning intensity. . .




    In 1989 there was hardly any type of headlight other than tungsten or tungsten halogen. Specification in watts was therefore simple and fairly closely defined. There is need for legislation to be brought up to date. Maximum intensity is also a consideration, especially for the dipped beam.


    There were similar problems with the introduction of l.e.d. bicycle rear lamps. The early ones attracted criticism that they did not comply with standards. They were in fact unremarkable, apart from the flashing option, and their output was too directional to comply with the standard. Nowadays of course, l.e.d. cycle rear lamps are far, far superior to the 0·6 W filament type that used to comply with the standard of those days.


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  • 0
    Chris Pearson:

     . . .

    Yes, but consider for a moment the The Road Vehicles Lighting Regulations 1989. A vehicle first used before 1 April 1986 must have headlights with a minimum power of 30 W (dipped and main beams). That presents a problem with LED lamps and since 1 Jan this year, LED conversions are an MOT fail. There is no specific requirement concerning intensity. . .




    In 1989 there was hardly any type of headlight other than tungsten or tungsten halogen. Specification in watts was therefore simple and fairly closely defined. There is need for legislation to be brought up to date. Maximum intensity is also a consideration, especially for the dipped beam.


    There were similar problems with the introduction of l.e.d. bicycle rear lamps. The early ones attracted criticism that they did not comply with standards. They were in fact unremarkable, apart from the flashing option, and their output was too directional to comply with the standard. Nowadays of course, l.e.d. cycle rear lamps are far, far superior to the 0·6 W filament type that used to comply with the standard of those days.


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