High-pressure sodium vapor lamps for open and closed luminaires. Product features: Lamp survival rate: 95% for 16,000 hours of operation. Average service life: up to 36,000 hours. Lamp maintenance factor: 80% for 16,000 hours of operation (according to DIN 13201). ErP-compliant according to EU Regulation 245/2009. Useful life (maintenance cycle): 4 years (at approx. 11 hours/day). Dimmable with conventional ballasts and electronic ballasts. Product advantages: Long service life. Very high luminous efficacy. Very good luminous flux behavior over the service life. Up to 50% energy savings when replacing mercury vapor lamps (HQL). Optimum energy efficiency when operated with EVG POWERTRONIC© PTo 3DIM. Areas of application: Streets. Outdoor lighting. Industrial plants. Suitable for closed and open luminaires. Outdoor applications only in suitable luminaires.
| Property | Value |
| Lamp wattage: | 250 W |
| Luminous flux: | 31600 lm |
| Color temperature: | 2000 K |
| Socket: | E40 |
| Diameter: | 91 mm |
| Total length: | 226.00 mm |
| Lamp shape: | ellipsoid |
| Average nominal lifetime: | 28000 h |
| External ignitor required: | yes |
| Color rendering index CRI: | 20-39 |
| Lamp luminous efficacy: | 126 lm/W |
| External ballast required: | yes |
| Plant lighting: | no |
| Replacement for mercury vapor lamp: | no |
| Weighted energy consumption in 1,000 hours: | 262.00 kWh |
| Lamp designation: | ED28 |
