A T45 bulb is 45mm (approximately 1.77 inches) in diameter. The "T" in the designation typically stands for "tubular," and the number following it indicates the bulb's diameter.
Understanding T-Bulb Sizing
The sizing convention for "T" series light bulbs, often used for linear fluorescent or specialty tubular incandescent bulbs, is quite straightforward. The number immediately after the "T" represents the bulb's diameter.
For a T45 bulb, this means:
- Diameter: 45 millimeters (mm)
To provide a clearer perspective, here's how the T45 size compares to a common related size, based on standard measurements:
| Light Bulb Code | Diameter in Millimetres | Diameter in Inches (Approx.) | Common Lengths (Approx.) |
|---|---|---|---|
| T30 | 30mm | 1.18" | 225-300mm |
| T45 | 45mm | 1.77" | 110mm |
Key Features of T45 Bulbs
Beyond their specific diameter, T45 bulbs often have particular applications or characteristics due to their shape and size:
- Tubular Shape: The "T" indicates a tubular form, which is ideal for evenly distributed light, especially in display cabinets, ovens, or certain decorative fixtures.
- Specific Lengths: While the diameter is fixed by the "45," the length can vary depending on the exact model and intended use. However, a common length for T45 bulbs is around 110mm.
- Applications: Due to their specific dimensions, T45 bulbs are often found in niche applications where space is limited or a specific aesthetic is desired. This can include:
- Appliance lighting (e.g., some refrigerators or ovens)
- Display case lighting
- Specialty decorative fixtures
When selecting a T45 bulb, always ensure that both the diameter and the length match the requirements of your fixture.
