Hello I'm new here but had a question concerning an old lamp. The lamp is one of those large GE globes (not sure of its exact "G" bulb designation). It has one of those metal disks near the bottom of the filament stem and (peering up into the bulb from the clear bottom), a horizontal linear filament & three supports -- one in the center of the filament & one for each lead-in wire. The stamp says: GE150W & then ·41 (41 preceded by a solid dot) below that. I also have the slightly-beat-up blue & yellow sleeve ("General Electric U.S.A.") to go w/ it. Would anyone know how old it might be? I'd post a picture if my digital camera hadn't gone south (might try w/ a scanner, though).

I will contact someone I know who can help you with it :-)

That's not quite that old. From the description of the packaging it came with, the lamp dates to May 1999 and the dot to the left should be a star actually. It's just a factory code. Home Depot still sells the GE 150w G-40 like yours but in a redesigned yellow packaging. Hope this helps.

Hello I'm new here but had a question concerning an old lamp. The lamp is one of those large GE globes (not sure of its exact "G" bulb designation). It has one of those metal disks near the bottom of the filament stem and (peering up into the bulb from the clear bottom), a horizontal linear filament & three supports -- one in the center of the filament & one for each lead-in wire. The stamp says: GE150W & then ·41 (41 preceded by a solid dot) below that. I also have the slightly-beat-up blue & yellow sleeve ("General Electric U.S.A.") to go w/ it. Would anyone know how old it might be? I'd post a picture if my digital camera hadn't gone south (might try w/ a scanner, though).

Ok, thanks for the information. The lamp has been sitting in my closet for I don't know how long. I found it when I was cleaning a few weeks back. But, unless it's a printing error, there is definitely a dot preceding the 41. About the diameter of a pencil point I'd say. I made an attempt to capture the lamp w/ a flatbed scanner, here.

I have an older G-40 Lamp too!

Madness:

That metal disk attached to the stem is a heat deflector.  Since this lamp is higher wattage and is likely to be burned base up, the heat deflector protects the lamp socket.