I have bought and installed some 10W and 30W LED outdoor floodlights. I was interested by the fact that the width of the beam is considerable, and the illumination is very even. I thus examined the pattern of the light coming from the units, using a piece of welding glass. The large pseudo-parabolic reflectors play no part in the beam shaping. The light from the central LED cluster scarcely touches them, and through the welding glass they appear black almost all over. The LEDs are recessed and there is no direct path from the surface of the LEDS to most of the the surface of the reflectors. The limits of the beam are defined by the line from the LEDs to the edge of the frame. Hence the illumination is very even but has a sharp edge cut-off. It appears that the reflectors are purely for show.
I'm not complaining; the lights work well and are very impressive. But I wonder if the market will mature and we will then have LED floods without the unnecessary reflectors? The things would certainly look neater without them.
Bill