I have some limited experience I ordered 6 3@ 250w and 3@150w.
1 250 and 1 150 were broken in shipping, sold one 250 and it came back as "too yellow" within 2 months. I'm using one of the 150s on our clam tank and I hate it! It fired up a nice chrisp bluish but soon faded to 14 month old AB yellow.