Miniature filament lamp for lighting fixtures inside ground transportation vehicles and planes.
Annotation breakdown:
SM – miniature lamp
28 – rated voltage
5 – rated power
Technical parameters:
| Rated voltage, V | 28 |
| Rated power, W | 5 |
| Luminous flux, lm | 34 |
| Average lifetime, not less than, h | 100 |
| Light color | white |
| Dimensions, mm (diameter x length) | 20 x 37 |
| Base type | B15d/18 |
