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  1. B

    45 lumens/watt LED ?

    I have found this kind of LED at ultraleds : http://www.ultraleds.co.uk/product_info.php?cPath=35&products_id=336&osCsid=cdec99213d654e1e9442eb8c68ba8d2d It is a 45 lumens/watt LED. Do you know it ? Who is the manufacturer ? It is said that it's a Luxeon but there is nothing about this LED at...
  2. B

    power driver for luxeon LED

    thank you for your assistance
  3. B

    power driver for luxeon LED

    Hi ! Il want to drive a 5W Luxeon powerled (7V and 700mA) with an efficiency better than 85 % (A PWM is needed, I dont want a simple resistor in serie with the bat.) Is there a dedicated circuit for that ?
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