Lighting upgrade:
I have searched the Forum, but have not found a direct reference to replacement of the GE F36BX/840 Fluorescent tubes (four-pin, "U" shape) with LED? I have one out (bulb, ballast, or both) and figured it's a great-time to start upgrading to LED, but short of purchasing an complete replacement fixture that will fit inside the existing recessed ceiling-box, have found nothing like the 4-pin GE FL bulb. Any advise sincerely appreciated!