IMHO
John T.
I am sure before the sun rises in California someone will disagree with me, but here we go:
IMHO It is safe to run about 600 watts of lighting with the generator powering the burner also.
I have seen this done for years even some running 1000 to 1200 watts of lighting and burner.
The unit in picture features -4- 300 watt halogen lights it is wired so no more than -2- can run simultaneously.
I have seen what works in the field, and base my humble opinion on more than 24 years experience in the industry first as a contract cleaner and now an equipment distributor and service center.