Herbert, have you considered a single LED ?

(I've no idea who's convenient for you to buy off, so I'll just
throw this one in)

http://www.ledsupply.com/led-catalog-luxeon-leds-red-luxeons.html

http://www.ledsupply.com/led-kits.html

http://www.luxeonstar.com/

3 practical articles for Luxeon LEDs

http://www.siliconchip.com.au/cms/A_100504/article.html

http://www.siliconchip.com.au/cms/A_30851/article.html

http://www.siliconchip.com.au/cms/A_30805/article.html

Pre-emptive brake light

http://www.siliconchip.com.au/cms/A_100992/article.html

And if you want to look a dufus

http://www.siliconchip.com.au/cms/A_30589/article.html

SC also did a circuit specifically for a high-mounted brake light,
but that's not archived yet

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