A lot of buzzers and bells come with different brand lights. I believe that these are there to make the reefer happy and not the reef. MH systems have been growing beautiful coral for many years with only on/off capability.
If you can live without some of these must have features, then you can save yourself quite a bit right there.
I currently have one 32" SB Reef Light that has out produced and out performed two Radion Gen3 G30s. Less then $300 is out performing more then $1,700.
But I don't have some features and on line programmability [ which I think is a major pain]. But I do have more par, coverage, and I think better spectrum.