I dont think the number of chips has as much to do with as the quality of the chips. I am going by the PPFD maps and you can see from the  Mars adds they dont really cover the area they claim. and believe me If I could have gotten a light that would do what I want for 1/2 the price I would have gone with it. I have a closet full of Mars lights I bought a little at a time and pissed away enough money on them I could have bought these and had change left over.