Weller soldering gun replacement light bulbs

I have the Weller 8200 100/140 watt gun, and I measured the voltage at the bulb socket at 1.9 volts AC. A 1.5 volt bulb might work, but have a short life. A 3 volt bulb would be a very safe choice. A 6 volt bulb would run about 1/4 of it's stated wattage (brightness) in this gun.

Power = (voltage^2/resistance), so operating at 1/2 voltage gives 1/4 power. I have the Weller 8200 100/140 watt gun, and I measured the voltage at the bulb socket at 1.9 volts AC. A 1.5 volt bulb might work, but have a short life. A 3 volt bulb would be a very safe choice. A 6 volt bulb would run about 1/4 of it's stated wattage (brightness) in this gun. Power = (voltage^2/resistance), so operating at 1/2 voltage gives 1/4 power.

I searched though my spare bulb collection and came across a 2.25 Volt bulb that is ideal. You want to use one that has the lens built into the end of the bulb so the light acts like a spotlight and not a floodlight. This is the bulb I use, can be found for less than a dollar. PHILIPS 222 .25A 2.25V TL-3 MINIATURE SCREW BASE I searched though my spare bulb collection and came across a 2.25 Volt bulb that is ideal. You want to use one that has the lens built into the end of the bulb so the light acts like a spotlight and not a floodlight. This is the bulb I use, can be found for less than a dollar. PHILIPS 222 .25A 2.25V TL-3 MINIATURE SCREW BASE

Thanks for the post, my gun is about the same age and the bulb finally went out. Thanks for the post, my gun is about the same age and the bulb finally went out.