Sounduser Registered 5Years Joined Sep 6, 2015 Messages 278 Location Solihull Apr 7, 2016 #1 Random question. Does anyone know why there is always black soot marks behind incandescent bulbs in the back box? And other random places.
Random question. Does anyone know why there is always black soot marks behind incandescent bulbs in the back box? And other random places.
Spandangler Site Supporter 10 Years Joined Jul 21, 2011 Messages 6,770 Location Suffolk Apr 7, 2016 #2 I think it's because incandescent bulbs are in fact little baby bonfires.
Alan Syson Site Supporter 10 Years Joined Jul 21, 2011 Messages 522 Apr 7, 2016 #3 Heat rising with the finer black crud that pins produce being taken with it?