21W T5 fluorescent tube with a G5 bi-pin base, producing approximately 2,100 lumens of 4000K Cool White (840) illumination. The General Electric T5 21W/840 provides efficient, uniform linear lighting for offices, retail spaces, workshops, schools, commercial interiors, and compatible T5 fluorescent fittings.
What it is
The General Electric T5 21W G5 840 Fluorescent Lamp is a slim, high-efficiency linear fluorescent tube designed for professional, commercial, and general lighting applications.
Its T5 construction measures approximately 16mm in diameter, while the G5 bi-pin base provides connection at each end to compatible T5 lamp holders. The standard 21W version has a nominal tube length of approximately 849mm.
Producing approximately 2,100 lumens, the lamp delivers strong linear illumination while consuming only 21W. The 840 colour designation identifies a lamp with approximately 4000K Cool White light and a colour rendering index in the 80+ range. GE specifies a CRI of approximately 85 for this lamp family.
The lamp requires compatible T5 fluorescent control gear and should not be connected directly to the 220–240V mains supply.
Use Cases / Applications
Ideal for linear fluorescent lighting applications, including:
- Offices
- Retail stores
- Commercial interiors
- Workshops
- Schools and educational facilities
- Task lighting
- Work benches
- Display lighting
- Warehouses
- Utility areas
- Kitchens
- Laboratories
- Existing luminaires designed for 21W G5 T5 fluorescent tubes
Key Benefits
- Efficient 21W fluorescent technology
- Approximately 2,100 lumens
- 4000K Cool White illumination
- 840 colour designation
- Good CRI ≈85 colour rendering
- Slim T5 / 16mm diameter construction
- G5 bi-pin base
- Approximately 849mm nominal tube length
- Excellent lumen output for its wattage
- Uniform linear light distribution
- Suitable for professional and commercial applications
- Long service life in compatible control gear
- Established General Electric fluorescent lamp technology
The T5 format combines a narrow tube diameter with efficient fluorescent technology, allowing luminaires to remain compact while providing high levels of evenly distributed light.
Safety Compliance
- Use only with compatible 21W T5 fluorescent control gear
- Do not connect the tube directly to mains voltage
- Confirm wattage, G5 base and tube length before replacement
- Different T5 wattages and lengths are not automatically interchangeable
- Use only with control gear designed for the lamp specification
- Isolate the electrical supply before installation or replacement
- Handle the glass tube carefully
- Avoid excessive force on the G5 pins during installation
- Fluorescent lamps contain a small quantity of mercury and should be disposed of through an appropriate recycling facility
- Not interchangeable with T8 G13 fluorescent tubes
Brand Reputation
General Electric has a long history in professional and commercial lighting, with its fluorescent lamp ranges widely used in offices, retail environments, industrial facilities, educational buildings, and other professional installations.
The GE T5 range was developed around efficient linear illumination, compact lamp dimensions, dependable performance, and extended service life for professional lighting systems.
Specification
- Type: T5 Miniature Fluorescent Tube
- Material: Precision Glass (G)
- Voltage: 220V
- Wattage:Â 21W
- Lamp Shape: T5 Linear Tube
- Lamp Length: 860mm
- Lamp Diameter: Approximately 16mm
- Lamp Base: G5 Bi-Pin
- Lamp Finish: Opal
- Color Temp: Cool White | 4000K
- Lumen: ±2100Lm
- Energy Saving: No
- Brand:Â Eurolux |Â General Electric | Philips | Sparkie
- Warranty: 1 Year
- Nationwide Shipping
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