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  1. G

    Realistic cd ratings for yellow/orange LEDs

    You know, blues and greens can operate at voltages lower than 3V (greens especially). Too late to help now but if you look in Farnell, you will find a couple of Avago LEDs in the standard T1-3/4 5mm package. One of them is the common 590nm amber and the other is a 615nm medium orange (in fact...
  2. G

    Are these LEDs a deeper blue than most?

    Hmm... I'm really looking for the common round T1-3/4 packages but definitely through-hole. Actually, sub-470s aren't as uncommon as you think. I can tell there's a 3mm one in my computer mouse and its manufacturer tends to use these in its other products. They are also used in signs and...
  3. G

    Are these LEDs a deeper blue than most?

    Thanks for the replies so far. Thanks for the recommendation. I already have a 435nm, 450nm and a few which I estimate around 460nm or upper 450s. What I'm looking for is that nice deep non-violetish blue which seems to put the normal 470s away from the blue middle. Apparently the standard 470s...
  4. G

    Are these LEDs a deeper blue than most?

    WP7113QBC/G (datasheet) WP7143QBC/G (datasheet) I found these Kingbright LEDs at Mouser while looking for a good primary blue colour (I know they exist; I've seen them everywhere). Most blue LEDs are the 470nm azure blue colour but these LEDs' datasheets rate their peak wavelength at 462nm with...
  5. G

    Ordering deep blue LEDs

    I collect 5mm T1 3/4 LEDs of varied wavelengths and I need to find a blue LED around 460nm (wherever it wont look cyanish or violetish) with reasonable high brightness (1000 mcd) and purity (25nm spectral half width). I got these Forge Europa LEDs from farnell recently: 1) U500B06WCSL 2)...
  6. G

    What is "blue impact"?

    I can't find any info with Google.
  7. G

    Red LED's are Orange !!

    Steel boils at little over 3000K (Halogen). Probably safe to assume it isn't heated to near that but BB radiation gives off a spectrum of colours so the colour has a low saturation; even more the case for lower temperatures where there is less of an emphasis for a particular peak wavelength...
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    Red LED's are Orange !!

    630nm: also known as "Hi Efficiency red" or "HeNe red" only really look orange when you compare them to the purer red 660s. The same is true if you compare the 630nm LEDs to the pure orange 610s. The orange LED then begins to look like an amber which, in turn, makes the 590s look pure yellow...
  9. G

    Why does nobody bin 420nm any longer?

    It looks like ledsupply makes them. 1000 millicandelas at 15 degrees. Not sure about spectral distribution or shipping limitations.
  10. G

    Violet tinge on blue LEDs

    My first post here. Is it just my imagination or is there a sort of violet quality to those standard 470nm T1-3/4 LEDs? Lit alone in the dark they just look like a monochromatic sky blue but under daylight conditions or with flourescent energy saving lights, I could swear the cast blue light...
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