Description
The OSRAM HE 21W/840 is a high-efficiency T5 fluorescent tube that provides cool white light. The “HE” stands for “High Efficiency,” which means the lamp offers good cost-effectiveness and efficiency
- Wattage: 21W
- Cap/Base: G5
- Color temperature: 4000 K (Cool White)
- Luminous flux: 1900–2000 lumens
- Diameter: 16 mm (T5)
- Length (excl. pins): 849 mm
- Color rendering index (CRI): 80–89 Ra
- Rated lifespan: Up to 24,000 hours
- Dimmable: Yes (when used with a dimmable electronic ballast)
- Energy efficiency class: F (according to EU regulation 2019/2015)
- Operating notes: Requires an electronic ballast for operation.
Key features
- Energy efficient: Compared to older T8 lamps, the T5 HE 21W/840 is designed to be more economical, using up to 20% less energy for a comparable light output.
- Slim design: The 16 mm (T5) diameter is up to 50% smaller by volume than comparable T8 tubes, making it suitable for compact luminaires.
- Excellent light maintenance: The lamp maintains its brightness well throughout its service life.
- Good color rendering: The “840” color code indicates a good color rendering index, meaning it reproduces colors accurately.
