In addition, the white light gets filtered by the red or green lens, cutting 
out other frequencies (colors).  The power that went into generating the 
unwanted colors is lost.  (Not fully applicable to single 'bulb' tri-color 
lights, there you have to live with the losses)

Leslie.

--------------------------------------------
On Thu, 10/30/14, Leslie Paal via CnC-List <[email protected]> wrote:

 Subject: Re: Stus-List Running Lights
 To: "Bill Coleman" <[email protected]>, [email protected]
 Date: Thursday, October 30, 2014, 12:45 PM
 
 Bill,
 
 LEDs generate light at a given frequency
 (color) based on the "impurities" on the chip. 
 Those are carefully controlled impurities; but can not be
 mixed for wide color spectrum.  So a red or green led will
 be tuned for that color and all the power goes into that
 color. Most likely their bulb is clear to get the best
 efficiency. 
 
 "White" LEDs work differently.  They
 have a blue/UV LED with yellow phosphor coating to make what
 looks to our eyes as white.  But it does not have as much
 power at red or green as a pure red/green LED for the same
 input power.
 
 I hope this
 helps.
 
 Leslie.
 
 --------------------------------------------
 On Thu, 10/30/14, Bill Coleman via CnC-List
 <[email protected]>
 wrote:
 
  Subject: Stus-List
 Running Lights
  To: [email protected]
 
 
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