hi guys,has anyone had any experience with auto darkening welding helmets ,the suppliers say to test hold helmet to a light 40w or more,iv'e done this with a 150w spot bulb and it still looks the same greenish colour does lcd screen literally go dark.iv'e tried all sensitivity options 9 to 13,i don't want to try welding light in case of a fault.i,ve used the test inside house so air temp is not to low.any help much appreciated cheers