| No. | Catalogue Number | Lamp Centre Height | Detail |
|---|---|---|---|
| 39 | ALH/243 | 30mm | |
| 40 | ALH/243/S | 30mm | integral starterholder |
| 39 | ALH/246 | 23.5mm | |
| 40 | ALH/246/S | 23.5mm | integral starterholder |
| 41 | ALH/243/1253 | 30mm | 1 wire for instant start circuits |
| 41 | ALH/246/1251 | 23.5mm | 1 wire for instant start circuits |
