The light intensity follows the inverse square rule. Basically if the area of
the light is doubled the intensity is divided by 4. It does that with distance
too. If you measure the light at 20' then at 40' the light will be 1/4 the
intensity.
Doug Fedeli
"Woodruff, Jason P" wrote:
> Candle power is total light. When focused you get higher intensity which is
> candlepower/area. The intensity is what makes a light look bright. As you
> know the wider the beam the less intense the light is. The 1million
> candlepower lights tend to be too focused for driving lights, but use what
> you need.
>
> As for wattage to candlepower, you need some sort of efficiency factor in
> there to be able to compare different types of bulbs, leds etc. Hence
> higher effency the more candlepower you get per watt.
>
> Hope that helps, my Physics book is packed away too.
>
> Jay W
> 4.7L Auto Sport+ C.C. 2wd Black
> Mods Profile page at
> http://www.twistedbits.net/WWWProfile/dakota/Re5X8z5la@Ix2/profile.htm
>
> --from sean---
> Watts are a measure of energy. Candlepower is a measure of luminance (how
> much light). You are trying to compare two different types of measurements.
> There is probably a correlation between the two, but I can not find anything
> here.
>
> ---from Jon---
> I'm a bit confused about wattage vs. candlepower when referring to lights.
>
> There doesn't seem to be a correlation between the two.
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:01:01 EDT