lumens-kelvin;

10/11/2015   
  lumens-kelvin;

lumens-kelvin;
To lumen ( lm) SI (internationalsystem - ) . . . . LUMEN Candela.
Lm=cdxsr ( sr =solidangie= )
elvin ( ) Kelvin.
.
.
Kelvin () () .
Warmwhite = 3000
Coolwhite = 6000
Daylight = 4500

ergo-tel , , !

!

!

(*) .