The first picture shows the two lamps positioned underwater. On the left there is the Scubamafia Beast (LED) at full 300W power. On the right there is my Salvo 200W HMI lamp at full power. You might notice how the HMI lamp matches quite well the "Outdoors" i.e. sunlight WB of my camera. Both lamps are at a depth of about 1 meter and positioned horizontally. Unfortunately from this angle you cannot see the effective widths of the beams. The width and intensity was very similar. (The other stuff in the water is related to an ongoing building project of an underwater deco habitat.)
The second picture shows the lamps side by side on the pier.