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GE Lucalox XO High Output Extra Long Life |
The XO lamp replaced the former ignition antenna mounted on bi-metal strips with a track of cermet sintered into the arc tube surface - similar to the PIA design introduced by Philips in 1997. The antenna is always oriented in-line with the support frame to minimise shadowing. In an unusual move for GE, its tradtional external amalgam reservoir has also been eliminated, in favour internal amalgam but uniquely, located at only one end of the arc tube. An intentional cold spot has been created behind one electrode by applying a heat shield around the other. Deleterious reactions between amalgam and the seals are avoided by the similarly unique 2-piece ceramic arc tube - at the amalgam end the diameter has been reduced by a co-moulded end plug without any join. The niobium seal is made to a thin wire instead of the usual tube, which maintains a greater distance to the amalgam.
Less evident is the mechanically polished arc tube surface(see detail photo) which increases transmission. The ceramic is believed to be NGK's G-40 zirconium-doped alumina, which achieves superior sodium resistance and allows a life increase. The traditional barium getter of the outer bulb has also been replaced by a zirconium-iron alloy, having superior sorption for hydrogen. All together, these multiple design innovations make the Lucalox XO lamps some of the most reliable and highly performing lamps in their class.
| Manufacturer: | General Electric Company U.S.A. | |
| Lamp Power: | 70 Watts | |
| Lamp Current: | 0.98 Amps | |
| Lamp Voltage: | 90 Volts | |
| Cap Type: | E27s/27 | Ni plated brass + vitrite |
| Bulb Type: | TD-38 | TD-12 in eighths/inch |
| Bulb Finish: | Clear | Soda-lime glass |
| Electrodes: | Backwound Tungsten | Ba2CaWO6 Emitter |
| Arc Length: | ||
| Atmosphere: | Inner: Na,Hg | Xe | Outer: Hard Vacuum |
| Luminous Flux: | 6,600 lm (@ 100 hrs) | |
| Luminous Efficacy: | 94.3 lm/W (@ 100 hrs) | |
| Colour Temperature & CRI: | CCT: 2100K | CRI: Ra 25 |
| Chromaticity Co-ordinates: | CCx: 0.530 | CCy: 0.430 |
| Rated Lifetime: | 28,500 hours | 50% survival, 78% flux |
| Warm-up & Re-strike Time: | 5 minutes | 4 minutes |
| Burning Position: | Universal | |
| Overall Length: | 156 mm | 65/32 inches |
| Light Centre Length: | 102 mm | 4 inches |
| Factory: | Budapest | Hungary |
| Date of Manufacture: | May 2008 | Date Code: 0506 |
| Original Value: | Unknown | |
