The test results from the HP 6024 supply revealed that when the current is limited to 4 amps with the same setup from the 6012B, ramping up the voltage to test the current regulation it immediately stops at 4 amps although I notice a slight blip in brightness from the bulb, but not as bright or as long as noticed on the 6012B. I am studying the manual but at least I confirmed there is no phenomenons occurring with my test setup.