Next message: Ken James: "Re: lv-ab: New LED Lights-SPECS"
wrote:
> HEllo All,
> Way Cool.
>
> OK. Now we need to actually get some REAL
> information.
>
> In other words, how many Lumins (candlepower) are
> the new LED units capable of producing?
> Also, what angle does the beam propagate
> (illuminate).
> What is the current requirement?
> What voltage is neded?
> ETC. ETC...
>
Reply;
Since I do not know the exact model they are using, I will spec a new
model I am familiar with.
It puts out over 60 lumens for a candalla rating of over 70 with a beam
angle (a very even beam pattern called Lambertian) of 140 deg max. It
runs at 700 ma max. Voltage is 3.6 to around 4 volts max.
This is not the most powerful model of this led available, for a bit
more $ a 100 lumen model will be available soon. Also, it is not the
most powerful led in this product line, you can get this led in this
type of design all the way up to 1.5 Amps! These particular leds are
notable in that they can be run continuously at temps up to about 360
deg F.!
These newer leds can replace hundred of leds from ten years ago,
thousands from 15 years ago.
There are a lot of things to know before you can use these leds to their
full potential, if you just try hooking one up to a battery and a
resistor and lighting it up it will most likely go poof! Thermal
dissipation issues are critical, knowing semiconductor basics is a
requirement and an understanding of optics is needed to get the most out
of them.
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