This is a signal lamp designed for signaling on the railway. At night, it illuminates the boxes showing the position of the switch mechanism. Instead of Tesla, the lightbulb has t logo.
One very interesting Tungsram lamp. It does not have a logo or any brand, but the brand can be recognized by the way the glass is made. I found the light bulb on the internet and exchanged it for 2 of the most common Chinese light bulbs. The power of this lamp is 25 W. I received it along with a green light bulb.
One very interesting Tungsram lamp. It does not have a logo or any brand, but the brand can be recognized by the way the glass is made. I found the light bulb on the internet and exchanged it for 2 of the most common Chinese bulbs. The power of this lamp is 25 W.
Here is my 2nd Soviet 40W lamp. I got it for free with 6 Elektroimpex tubes. I drove it with these 6 tubes on my bike and they survived the ride. The markings on the flask are worn out and barely noticeable. Nice tube.
Here are lamps from Bulgaria. I found them discarded in working condition due to replacement with LEDs. These tubes do not have a date code. The coating is almost uniform like Philips. Pins are made of brass. 6500K color.
This is one of my favorite tubes. It's very durable and you can see that it worked a lot, but here's the miracle: it still turns on fine, gives a lot of light, and colors are clearly visible.
One of the highest quality tubes. I got it new because the building has been renovated and had LED lighting installed. The tube shines beautifully and the colors are clearly visible. There are no cathode guards.
