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Harvard 21W 2D Combined HF and Emergency Ballast
Quick Find: 6927
Product Discontinued
This item was discontinued on 21st February, 2023
Alternatively check out our full range of simular products below:
Harvard Ballasts
Accessory Type
Ballast
Compatible Lamp Type
2D (4 Pin)
Control Gear Technology
Fluorescent
Control Gear Type
High Frequency
Dimming?
Non-Dimmable
Height
29 mm
Length
160 mm
Manufacturer
Harvard
No. Of Lamps
Single (1x)
Type
Control Gear
Wattage
21 W
Width
70 mm
Product Overview
Harvard 21W 2D Combined HF and Emergency Ballast from Harvard
Model: DE21
A Harvard Combined HF and Emergency Ballast
Technical Specifications
| Control Gear Type | High Frequency |
|---|---|
| Accessory Type | Ballast |
| Wattage | 21 W |
| Manufacturer | Harvard |
| Dimming? | Non-Dimmable |
| No. Of Lamps | Single (1x) |
| Cells | 3 (3.6v) |
| Height | 29 mm |
| Lamp | 21 Watt 2D |
| Length | 160 mm |
| Type | Control Gear |
| Width | 70 mm |
| Compatible Lamp Type | 2D (4 Pin) |
| Control Gear Technology | Fluorescent |
Alternative Stock Identifier Part Codes
Downloads 1
 | Product Data Sheet Harvard High Frequency Data Sheet |
Related 2
Lawrence Gibbons
12th December 2025
These guys deserve a review just because of how expertly packaged they sent my fragile and delicate T5 tubes. I will admit not having high hopes of a courier being able to deliver these in one piece but they were snugly bubble wrapped in a very sturdy cardboard tube. Fantastic fast delivery.
Isabel Davies
3rd December 2025
BLT suggested an alternative light bulb for one that had been discontinued which meant I didn't have to replace the fitting, very helpful, thanks
