A compact flat fluorescent format with a double-D tube arrangement that produces broad light from shallow fixtures.
A 2D lamp bends a narrow tube into two adjacent D-shaped loops. Two-pin GR8 and four-pin GR10q versions are electrically different.
Bulkhead fixtures, corridors, stairwells, bathrooms, exterior wall lights, hospitality properties and public buildings.
2D lamps are available as fluorescent products and LED replacements in multiple wattages, sizes and control-gear configurations.
Technologies represented in this library: Fluorescent, LED.
Available base types: GR8, GR10q.
| Technology | Common wattage range | Typical lumen range | Common colour temperatures | Common voltage options |
|---|---|---|---|---|
| FLUORESCENT | 10–55 W | 600–4000 lm | 2700K, 3000K, 3500K, 4000K, 6500K | Ballast-operated |
| LED | 5–25 W | 500–3000 lm | 2700K, 3000K, 4000K, 5000K, 6500K | 120–240V direct-wire or ballast-compatible, depending on product |
These are representative market ranges, not guaranteed limits. Availability varies by manufacturer, voltage, base, beam, region and product generation.
Match lamp wattage and dimensions, then identify whether the base is GR8 or GR10q and whether any LED replacement is ballast-compatible or direct-wire.
GR8 two-pin and GR10q four-pin lamps are not interchangeable. LED replacements may also require ballast removal or a specific supply connection.
Important: The library describes a lamp format, not a particular product. A shared shape does not guarantee matching voltage, base, dimensions, light distribution or control-gear requirements. Confirm the fixture label and product datasheet, or ask a Bulb World lighting specialist.
Match lamp wattage and dimensions, then identify whether the base is GR8 or GR10q and whether any LED replacement is ballast-compatible or direct-wire.
GR8 two-pin and GR10q four-pin lamps are not interchangeable. LED replacements may also require ballast removal or a specific supply connection.
These are common market ranges. Exact specifications vary by manufacturer and product
Send us a photo, the markings on your existing bulb, or your fixture details. Our team will help you identify a suitable replacement.
