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siongboon
Joined: 24 Jan 2006
Posts: 288
Helped: 25
Location: Singapore
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 06 Oct 2008 16:44 which is brighter 3mm led vs 5mm led |
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Hi everyone.
I have a question.
Given a limited board space, and a fix illumination target.
Which type of Lamp of LED would produces the brightest effect.
I am thinking the 3mm LED is smaller and can fit in more LED
within the same board space.
With more die on the PCB board, I guess the sum of light energy
would be greater then a 5mm LED.
The manufacturer advise on 5mm LED but I would like to
understand why is this so?
Thank you.
Best Regards,
Siong Boon
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06 Oct 2008 16:44 Ads |
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Old Nick
Joined: 14 Sep 2007
Posts: 445
Helped: 49
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07 Oct 2008 0:06 Re: LED which one is brighter. 3mm or 5mm |
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| The brightest one will most probably the one with the highest current rating. If they are the same then go for the smaller one.
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Audioguru
Joined: 19 Jan 2008
Posts: 1147
Helped: 95
Location: Toronto area of Canada
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08 Oct 2008 18:15 LED which one is brighter. 3mm or 5mm |
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| Cheap LEDs look bright because they have a focussed narrow viewing angle.
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PICAXE_Kiwi
Joined: 18 Sep 2008
Posts: 5
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10 Oct 2008 1:40 Re: LED which one is brighter. 3mm or 5mm |
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| The size of the LED will not (majorly) affect the brightness of the LED. Look at the MCD rating of the LED on a datasheet, and compare the two to see which is the brighter. The size should not really be an issue
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