The "full spectrum" chip on board led.
I think most of the led light fixture have the single colored led, installed in an array.
Pple have been saying abt disco light effect. So I guess some light fixtures utilize those "bug eye" reflectors to spread out the light. And some have to install the light fixture higher above the water surface to have a better light spread.
So chanced upon this led. Looks great. Theoretically it should be better than having each individual color led installed. http://www.ledgroupbuy.com/lumia-5-1-100w-full-spectrum-5-channel-led/
Am not saying this led is good but aquarium led tech is still evolving and I just feel the multi chip would be able to mimic that single source of a mh.
For those who like to DIY, maybe u would like to try this type of chip. Can also google on chip on board led or multi chip.