Чехословакия

During cleaning in the pantry, I found this exhibit. Honestly, I can't even think of where did it come from.

One of the rarer bulbs. I found it in a shed in a box. The lamp has a power of 250 W and heats up well. TESLA brand (Czechoslovakia). There are no traces of marking on the flask, because it has worn off from long use.

Tesla SHC400 high pressure sodium lamp of early design, possibly of 1967, developed by Otto Sofka and Milan Neužil. The arc tube has niobium caps on the end seals, same as with the GE American lamps of this time. Getters of the outer jacket are unusually parallel mounted.

TESLA RVL 250W 141

Lamp power: 250 W

System Power: 268 W

Starting current: 3.3 A

Lamp current: 2.2 A

Luminous flux: 10,000 lm

Socket: E40

Life: 3000 h