Maybe I am taking this thread a little off topic here, and I apologize if I am.
I am just getting into SW
and lighting comparisons and I find this site pretty helpful.
It has a picture of a tank and by clicking buttons, you can change half of the image to another bulb with a different Kelvin rating. So, you can get a side by side comparison.
It shows the Brand, Kelvin Rating and values for Par, WATT, MaxWATT, AMP, and MaxAMP.
I am sure that the color is off slightly due to the digital photography but it seems to give you a hint as to what the different bulbs seem to look like.