On 11/16/16 8:00 AM, Leon wrote:
On 11/16/2016 12:58 AM, whit3rd wrote:
On Sunday, November 13, 2016 at 8:11:28 AM UTC-8, Leon wrote:

Fast forward and LED's lights now use, in many cases, yellow filters to
filter out the blue.

Actually, that yellow color is a phosphor; LED illumination starts
with a blue
LED (sharp spectrum line) and generates other wavelengths with phosphors.
Fluorescents start with ultraviolet (from mercury in the gas of the
tube) and
generate visible light with phosphors.



Excuse me for using the wrong terminology. But with out the yellow you
get blue, the point I was trying to make. ;!)

There is no mercy on the wreck!

It is these phosphor mixes that are driving the LED lighting market.
Very difficult and proprietary tech. Need a great UV light source? Get
one of those Phillips bulbs with the phosphor coating on the bulb
envelope and remove that envelop. All the creepy crawlies like scorpions
will glow brightly in you garage/shop at night....


-BR