>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 02 March 2006 10:02
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE] LEDs as lighting
>
>
>>One of the safety features touted for the LED based
>>center brake lights is the instant on time.
>
>Oh, haven't heard that claim actually made. I would have 
>thought the only real safety feature is they are less likely 
>to burn out.
>
>>Wether the time difference is actualy reduces
>>accidents I don't know,
>
>I have serious doubts that it does. After all a filament bulb 
>is essentially instant on anyway, it must take all of 100 mS 
>to reach full brightness, and fade again - apart from 
>headlights that is where the fade of the glow is easily seen 
>in the dark.

One argument would be that at 70mph you travel a bit over 3 meters in 100ms, which is about one car length...

Regards

Mike

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