The curly fluorescent bulbs have a measured high enf, and can cause headaches, dizziness, etc. We have gone back to incandescent bulbs till we run out. The led do not seem to mess with me, so will change to them in time.
I have found in my machine shop proper grounding of equipment is important both for me and for computer controls . The stray voltage can be 5 volts, enough to mess with the computer . And makes me feel odd after a bit. We run three phase, three wire, no ground. So adding an external ground wire solves the stray voltage. Modern three phase is 5 wire, three for each phase a neutral and a ground. So anything electrical needs to be properly grounded to minimize emf's for your sake and for delicate electronics.
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