A legacy tubular format with a nominal diameter of one and one-half inches, still encountered in many existing installations.
T means tubular and 12 represents twelve eighths of an inch, or 1½ inches, in nominal diameter. Base styles vary by length and system.
Older offices, schools, workshops, warehouses, signs, industrial facilities and retrofit projects involving existing fluorescent fixtures.
T12 lamps are primarily fluorescent, with LED retrofit options available for selected lengths and bases. Fluorescent systems may use magnetic or electronic ballasts.
Technologies represented in this library: LED, Fluorescent.
Available base types: G13, FA8, R17d.
| Technology | Common wattage range | Typical lumen range | Common colour temperatures | Common voltage options |
|---|---|---|---|---|
| LED | 12–42 W | 1400–5500 lm | 3000K, 3500K, 4000K, 5000K, 6500K | 120V; 220–240V; 120–277V; wiring-dependent |
| FLUORESCENT | 15–110 W | 700–9000 lm | 3000K, 3500K, 4100K, 5000K, 6500K | Ballast-operated |
These are representative market ranges, not guaranteed limits. Availability varies by manufacturer, voltage, base, beam, region and product generation.
Match length, diameter and base, read the original lamp and ballast labels, and determine whether an LED replacement is ballast-compatible, ballast-bypass or externally driven.
T12 and T8 lamps may share G13 pins but differ in diameter, electrical characteristics and ballast compatibility. Physical connection does not guarantee safe operation.
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 length, diameter and base, read the original lamp and ballast labels, and determine whether an LED replacement is ballast-compatible, ballast-bypass or externally driven.
T12 and T8 lamps may share G13 pins but differ in diameter, electrical characteristics and ballast compatibility. Physical connection does not guarantee safe operation.
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.
