These are a nice looking light but with a average life of 500 Hours and less it is far from afordable (that would ba a change every 50 days running 10 hours a day) and that high life is just for the 2500Watt and 4000Watt versions.. the 1200 watt version has a average life of 150 hours.
if you want to check them out you can see the different types made
HERE HMI is a osram/selvana copy righted brand name.
Steve