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Wow, I build my own 110mW red ones, from broken DVD-RW drives.
Apart from the heatsink/housing, and narrow breadboard, everything else is available at Jaycar.
I know their visible range is at least 500m at noon, on a sunny day.
Haven't tried it at night, as I have several flight paths crossing close to my home, and I'm not that bold.
I know that the red can burst balloons at 20m, easily.
Just about to build a purple (445nm) one, with the diode from an XBox 360. That should look perty!
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