|
Osram Dulux-L 24W Compact Fluorescent |
Whereas Philips had developed its original range to replace miniature fluorescent tubes in home lighting, Osram was first to capitalise on professional markets by replacing linear fluorescents with compacts having just a third of the length. This required extending the concept to much higher powers. Although Osram and Philips had jointly agreed the standards for these lamps during development, Osram was first to market in 1984, and Philips followed later in 1985.
This lamp is representative of the first high-lumen variant. It would not have been practical to simply increase the length of the original lamps, because the discharge voltage would become too high for operation on ordinary mains voltages. The inner diameter of the tubes was therefore increased from 10mm to 15mm, to achieve high powers and with a lamp voltage suitable for compatibility with the existing range of linear fluorescent ballasts. The large G32 cap is a scaled-up version of the G23 interface used on smaller lamps, but since the high power lamps were intended for professional applications, it was desirable to have 4-pins to allow use with electronic and dimmable control gear. The rectangular post on the cap was originally intended to house a glowbottle starter for a 2-pin version, but a few months after their launch it was decided to offer only 4-pin lamps. In 1985 the dead space was eliminted and this lamp became obsolete, replaced by a shorter model with 2G11 cap.
| Manufacturer: | Osram GmbH | |
| Lamp Power: | 24 Watts | |
| Lamp Current: | 0.340 Amps | |
| Lamp Voltage: | 91 Volts | |
| Cap Type: | G32q-1 | PBT |
| Bulb Type: | T-18 | T-6 in eighths/inch |
| Bulb Finish: | BAM, CAT, YOX phosphors | Soda-lime glass |
| Electrodes: | Triple Coil Tungsten | Triple carbonate emitter |
| Atmosphere: | Argon + Hg | |
| Luminous Flux: | 1,800 lm @ 100h | |
| Luminous Efficacy: | 75 lm/W @ 100h | |
| Colour Temperature & CRI: | CCT: 3000K | CRI: Ra 81 |
| Chromaticity Co-ordinates: | CCx: | CCy: |
| Lifetime: | 5000 hours | |
| Warm-up & Re-strike Time: | 2 minutes | Instant |
| Burning Position: | Universal | |
| Overall Length: | 340 mm (314 mm without pins) | 17 1/8 inches |
| Lighted Area: | 300 x 38 x 17.5 mm | |
| Mass: | ||
| Factory: | Augsburg | Germany |
| Date of Manufacture: | 1985 June | Date Code: rd6 |
| Original Value: | ||
