Connect with us

LED bulb design- how to find luminance

Discussion in 'LEDs and Optoelectronics' started by KUMARA SHP, Dec 16, 2014.

Scroll to continue with content
  1. KUMARA SHP

    KUMARA SHP

    122
    4
    Aug 1, 2014
    I am designing LED bulb to operate in 30mA and 48V

    but I need to know the output luminance of bulb

    how can I get it from this graph?
    Capture.JPG

    I know luminance at forward current 65mA is 32lm.
     
  2. KUMARA SHP

    KUMARA SHP

    122
    4
    Aug 1, 2014
    sorry for English ( I am talking about lumens - )
     
  3. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    Since that chart is showing relative luminance, take the ration of the reading from the chart at 30 divided by the reading at 65 and multiply by 32 lumens.

    It looks like 1.0 at 65 mA, and about 0.5 at 30mA so, 1/2 of 32 or 16 lumens.

    Bob
     
  4. KUMARA SHP

    KUMARA SHP

    122
    4
    Aug 1, 2014
    thanks I thought that but I had not sure about my answer
    thanks It was helpful.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-