The bulb is a Westinghouse lifeguard mercury vapor bulb
@djm5k
Ай бұрын
Couldn’t really see the letters and numbers engraved into bulb screw base, but if they consisted of “JFMAMJJASOND 1234567890”, the letters stand for the months of the year, January, February, March, April, etc. The numbers stand for the last number of the year. These were provided for fixture and bulb installer to mark the month and year the bulb was installed, where the service person would scratch out the month letter and number with a sharp object. This way, the next time the bulb burned out or was checked, they could see when bulb was installed. This was done in the older bulbs, those made in the USA. The newer HID bulbs don’t have these markings, but have a date code of manufacture instead engraved on bulb base. Out of all the older HID bulbs I have seen, I have never once seen one where the date markings were scratched out. The service people were probably too much in a hurry to take the time to scratch out the month and year on these bulbs.
Пікірлер: 3