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plasma?
Good guess, normally Giesemann has 4 X 250 or 400 Watts to get those reading, but spacing seems off for four bulbs this light is coming from the center; I guess this one only has three. Something is off.It's got a rounded top and it's a six foot fixture. It puts out "God beams" which means it's a metal halide. So I've come to the conclusion that it's a Giesemann Spectra HQI/T5.

As far as the light fixture goes, your hints are very interesting. The pic looks like a high-power LED array, but I don't know which one of those would have gotten poor reviews or a "bad rap". There are plenty of crappy LED fixtures out there, but this doesn't look like one of those!!
But, like my talks I like to get people involved with my topics. Thank you guys and gals for participating. 
