Yes they are worth it... From someone who is apart of that 70%... And also spent over a year of research, before getting a ''Nice Light''. Simply, because it is such an expensive and critical component to our Reef Systems... When you consider that you can completely tweak them, swap out ALL the components(leds,drivers,potentiometers,etc.), and they come with a warranty... Very Reliable, and ''Great Bang for The Buck''. Spending the extra for an IT Series, is my only regret Not Doing... I really wish I did, I have just the basic D-120's. Nonetheless, I am Very happy with my lights, you could get away with 3 of the 2040??( I think that's the name for the one that replaced the D-120), of them on your tank for full coverage side-to-side.