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GE SOX-Plus Extended Life Lamp |
In terms of construction, SOX-Plus lamps are virtually identical to their predecessors. For a number of years ordinary SOX lamps had been out-performing their life claims, and rather than simply upgrading the specification, Philips cleverly re-marketed them as apparently superior products under the SOX-Plus name. Since longer life was advantageous to users, a higher price and hence greater profits could be commanded. The higher selling price was needed to counter the terms of the longer warranty, since an increase in the number of claims could be expected. After a number of years when this was widely known, the orginal SOX ranges disappeared and were replaced by SOX-Plus.
This GE lamp makes use of the same red colour cap as the Philips SOX-Plus to indicate its longer claimed lifetime. Shortly before its introduction, the discharge tube top support was changed in all GE SOX lamps. The former 2-piece metal construction with ceramic insulator has been replaced by a single-piece component formed from metal sheet. The shape of the domed end of the outer envelope has been flattened to allow the IR coating to extend further over the bend for better thermal insulation. Owing to the elimination of the ceramic isolator tube, a gap has been left in the IR coating to avoid its accidental electrification by coming into contact with the barium getter near the cap.
| Manufacturer: | General Electric USA | |
| Lamp Power: | 37 Watts | |
| Lamp Current: | 0.6 Amps | |
| Lamp Voltage: | 70 Volts | |
| Cap Type: | BY22d | Alkyde Insulator |
| Bulb Type: | T-50 | T-16 in eighths/inch |
| Bulb Finish: | Indium-tin oxide film | Soda-lime glass |
| Electrodes: | CCC-4 Beehive | Black W + BCT emitter |
| Arc Length: | ||
| Atmosphere: | Na | 99% Ne, 1% Ar | Outer: Hard Vacuum |
| Luminous Flux: | 4,600lm (@100h) | |
| Luminous Efficacy: | 131 lm/W (@100h) | |
| Colour Temperature & CRI: | CCT: 1700K | CRI: Ra -44 |
| Chromaticity Co-ordinates: | CCx: 0.574 | CCy: 0.425 |
| Rated Lifetime: | 16,000 hours | 80% flux & 80% survival |
| Warm-up & Re-strike time: | 9 minutes | Instantaneous |
| Burning Position: | Vertical cap up ± 110° | |
| Overall Length: | 311 mm | 12¼ inches |
| Light Centre Length: | 180 mm | 7 inches |
| Factory: | Leicester | England |
| Date of Manufacture: | April 2007 | Date Code: 04/07 |
| Original / Present Value: | ||
