Not to get into a long discussion, but it has to do with light spectrum mixing. T5s and Halide ignite and mix immediately and then are reflected into the tank.
LED is each individual led separated and cannot mix. Companies use diffusers to try to mix and spread the light to help this. It does help, but not enough in my opinion.
Radions, up until the Gen 4, used pucks that had some leds in them and were under reflectors. These worked fairly well. Now, all leds are packed along with each other and it loses the blending.
Illumagic Blaze fixture is one of the best I've seen at laying out LEDs like I believe they should be.
LED is each individual led separated and cannot mix. Companies use diffusers to try to mix and spread the light to help this. It does help, but not enough in my opinion.
Radions, up until the Gen 4, used pucks that had some leds in them and were under reflectors. These worked fairly well. Now, all leds are packed along with each other and it loses the blending.
Illumagic Blaze fixture is one of the best I've seen at laying out LEDs like I believe they should be.