With all due respect, comments from Piechaser, Falcon900 and Robin 400 show clear lack of knowledge, relevant experience and even intelligence
Oh dear!
During autorotation what effect will a heavy electrical load (landing light, search light) have on the rotor rpm
The square root of FA!
Do you think a light bulb is going to consume sufficient power to overcome the kinetic energy being derived from a 3 tonne helicopter descending at 2,000 ft/min?