39W T5 High Output fluorescent tube with a G5 bi-pin base, producing approximately 3,500 lumens of neutral 4000K Cool White (840) illumination. The GE T5 LongLast 39W/840 combines a slim 16mm profile with strong linear light output, making it ideal for offices, retail spaces, workshops, commercial interiors, schools, and compatible T5 HO fluorescent fittings.
What it is
The GE T5 LongLast 39W G5 840 Fluorescent Lamp is a slim High Output (HO) linear fluorescent tube designed for professional and commercial lighting applications where strong, uniform illumination is required from a relatively compact lamp.
Its T5 construction measures approximately 16mm in diameter, while the G5 bi-pin base provides connection to compatible T5 lamp holders. The 39W HO lamp measures approximately 849mm in length, placing it in the compact high-output family of T5 lamps.
The lamp produces approximately 3,500 lumens with a 4000K Cool White colour temperature. Its 840 designation identifies good colour rendering in the 80+ CRI range; GE specifies approximately CRI 85 for this lamp.
As a T5 HO (High Output) lamp, it is designed to deliver greater light output from a relatively short tube. It requires compatible 39W T5 HO electronic control gear and should not be connected directly to the 220–240V mains supply.
Use Cases / Applications
- Offices
- Retail stores
- Commercial interiors
- Workshops
- Educational facilities
- Task lighting
- Display lighting
- Laboratories
- Work benches
- Supermarkets
- Utility areas
- Industrial facilities
- Existing luminaires designed for 39W G5 T5 HO fluorescent tubes
Key Benefits
- 39W T5 High Output (HO) fluorescent technology
- Approximately 3,500 lumens
- 4000K Cool White
- 840 colour designation
- Approximately CRI 85
- Slim 16mm T5 construction
- G5 bi-pin base
- Approximately 849mm tube length
- Strong light output from a compact linear lamp
- Uniform linear illumination
- Suitable for professional and commercial environments
- GE LongLast fluorescent technology
- Rated life of approximately 30,000 hours under specified operating conditions
The T5 High Output platform is particularly useful where greater illumination is required without moving to a physically larger fluorescent lamp. GE’s catalogue classifies the F39W/T5/840 specifically within its T5 High Output family.
Safety Compliance
- Use only with compatible 39W T5 HO electronic control gear
- Do not connect directly to the 220–240V mains supply
- Confirm 39W rating, G5 base and 849mm tube length before replacement
- Do not assume T5 HE and T5 HO lamps are interchangeable
- Isolate the electrical supply before installation or replacement
- Handle the glass tube carefully
- Avoid excessive pressure on the G5 pins
- Fluorescent lamps contain a small amount of mercury and should be disposed of through an appropriate recycling facility
- Not interchangeable with T8 G13 fluorescent tubes
- Suitable for compatible 39W T5 HO G5 fluorescent luminaires
- Confirm wattage, length, G5 base and ballast compatibility before installation.
Brand Reputation
General Electric has a long history in professional lighting, with its fluorescent lamp technologies widely used in commercial, industrial, retail, educational, and institutional applications.
The GE T5 LongLast range was designed for professional fluorescent installations and included both High Efficiency and High Output families, with the 39W lamp belonging to the High Output range.
Specification
- Type: T5 Miniature Fluorescent Tube
- Material: Precision Glass (G)
- Voltage: 220V
- Wattage: 39W
- Lamp Shape: T5 Linear Tube
- Lamp Length: 1450mm
- Lamp Diameter: Approximately 16mm
- Lamp Base: G5 Bi-Pin
- Lamp Finish: Opal
- Color Temp: Cool White | 4000K
- Lumen: ±3500Lm
- Energy Saving: No
- Brand: Eurolux | General Electric | Philips | Sparkie
- Warranty: 1 Year
- Nationwide Shipping
Reviews
There are no reviews yet