|
Lucalox Sodium with internal electronic ignitor
|
|
|
 |
Since the introduction of the high pressure sodium lamp, the requirement for an external high voltage ignitor has always been seen as an undesirable system component. This is particularly relevant to the lower wattage lamps where the inclusion of an ignitor in the circuit means a significant size to the luminaire which must house it.To satisfy this requirement, low wattage lamps with internal ignition devices such as this are produced. Traditionally though, internal starters are based on moving bi-metal strips such as in the glowbottle starter or thermal snap-switch. Both are inherently unreliable and frequently fail before the arc tube reaches its end of life. The FEC internal electronic ignitor found in Japanese Iwasaki lamps works outstandingly well, but is protected by international patents.
This GE lamp also makes use of an electronic ignitor for total reliability, but it is located outside the lamp and within the skirted portion of the metal base. Via a third wire in the stem press it provides a high voltage signal to a probe on the side of the arc tube to facilitate ignition.
|
 |
| Manufacturer: |
General Electric Company U.S.A. |
| Lamp Power: |
70 Watts |
| Lamp Current: |
0.98 Amps |
| Lamp Voltage: |
90 Volts |
| Cap Type: |
E27s/38x54 |
Brass + vitrite |
| Bulb Finish: |
Clear |
Lead borosilicate glass |
| Bulb Type: |
E-75 |
E-23½ in eighths/inch |
| Overall Length: |
186 mm |
7 3/8 inches |
| Light Centre Length: |
117 mm |
4 5/8 inches |
| Arc Length: |
|
| Electrodes: |
Backwound Tungsten |
Barium Calcium Tungstate |
| Atmosphere: |
Na,Hg | Xe |
Outer: Hard Vacuum |
| Luminous Flux: |
5,800 lm @ 100 hrs |
5,220 lm @ 8,000 hrs |
| Luminous Efficacy: |
82.8 lm/W @ 100 hrs |
74.6 lm/W @ 8,000 hrs |
| Colour Temperature & CRI: |
CCT: 2000K |
CRI: Ra 25 |
| Chromaticity Co-ordinates: |
CCx: 0.530 |
CCy: 0.430 |
| Burning Position: |
Universal |
| Rated Lifetime: |
16,000 hours |
to 50% survival |
| Warm-up & Re-strike Time: |
8 minutes |
5 minutes max |
| Factory: |
Ravenna, OH |
U.S.A. |
| Date of Manufacture: |
July 1990 |
Date Code 31 ._ |
| Original & Present Value: |
£31.21 (1991) |
£44.89 (2005) |
|
|
 |
