Amazing technology that gives the filmmaker endless possibilities with color temps from 2000K to 10,000K. They give you the ability to create lighting effects, match gel colors, dim down to .1. You can put them into a dimmer board to control everything. Iuse them for bounce, for pushing through diffusion frames, I use them to create room tone in a room by bouncing them into the ceiling. I use honey combs that control the light so that it does not fly all over the place. They have changed the way Ilight.