So it turns out my light needed a new pcb board according to the company's support diagnosis. I had to do a few driver switches before all involved realized I need a new pcb board (that's what they call the light board).
The replacement arrived yesterday.
Houston, we have a problem!
I wonder if they even have my part still considering that the 'blurple' stuff is about 3 or 4 years old. Personally I am hoping the parts aren't there and I can get them to agree to a similar newer light (TSL-2000) for an additional $50 or less. I'm certainly not spending anymore to get the right part though.
You're probably right. I doubt they have boards that old. That's been a large part of the problem with the LED market - there are so many different makers putting them together with so many different parts that they tend to change very rapidly.
So the unit on the right (green) is a top and bottom of the same unit (my bad angle/separation in the picture). Even sideways the replacement is too big and the light box as a whole is not deep enough to clear the fans of the heat sinks.
So I was thinking this morning that I would have to contact Mars Hydro to see what is happening with my replacement board if I saw no email from them by this evening. Low and behold the new, new replacement arrived in the mail this afternoon. it is now installed and works like new!