I recieved today, a replacement lamp for an old zone VI cold light head for my D2 enlarger. The lamp is a V-54 High Intensity from Aristo Grid. It came mounted on cardboard and as I was looking it over I noticed that there is a "weld" in the glass where I guess they ran out of tube and joined the next legnth of tube, and continued making the lamp.
The thing is the glass is clear for about a 1/4 inch where the joint is. No interior frosting, or Phospher in this area. The joint is not on but near the outside edge of the cold light diameter. Wouldn't this "Blank" area affect the light in color or brightness? I thought these lamps were one continus legnth of tube for consistant output and color? Will this make a "hot spot" or "dead" spot? Is it a leak waiting to happen? Should I send it back for replacement?