2GX13 T5 Circline 22W 840 Cool White Fluorescent Tube – 225mm

The 2GX13 T5 Circline 22W 840 Cool White Circular Fluorescent Tube is a compact circular replacement lamp designed for compatible fittings requiring a 22W T5 Circline fluorescent tube with a 2GX13 4-pin base.

Producing approximately 1800 lumens with a clean 4000K Cool White (840) colour temperature, this lamp provides bright, broad and even illumination from its slim circular design.

With an approximate 225mm outside diameter and 16mm T5 tube diameter, this lamp is ideal for compatible low-profile ceiling fittings, circular luminaires and specialist fluorescent fixtures where space is limited.

This lamp is particularly useful as a replacement for older or hard-to-find 22W/840 2GX13 T5 Circline fluorescent lamps, including compatible Philips MASTER TL5 Circular and equivalent manufacturer lamps.

Key Features

• 22W circular fluorescent lamp
• T5 Circline design
• 2GX13 4-pin base
• 840 colour code
• 4000K Cool White
• Approximately 1800 lumens
• CRI approximately 80+
• Approx. 12,000-hour nominal life
• Approx. 225mm outside diameter
• Approx. 16mm tube diameter
• Slim circular / ring-shaped fluorescent design
• Broad and even light distribution
• Suitable for compatible electronic control gear
• Ideal replacement for compatible 22W/840 2GX13 lamps
• Suitable for residential, commercial and professional lighting applications

Technical Specifications

Compatible & Equivalent Lamp References

This 22W 840 2GX13 T5 Circline fluorescent lamp may be suitable as a replacement for equivalent circular lamps requiring:

22W • T5 • 2GX13 • 4-Pin • 840 • 4000K • Approx. 225mm

Philips MASTER TL5 Circular Cross-Reference

A particularly useful replacement reference is:

Philips MASTER TL5 Circular 22W/840 – 2GX13

Other useful Philips identification numbers include:

Order Code: 927965084013

EAN: 8711500642219

The Philips version matches the important lamp format:

22W • T5 • 2GX13 • 840 • 4000K • 1800 lumens

If your existing lamp is marked MASTER TL5 Circular 22W/840, compare the physical diameter and 2GX13 connector with this product before ordering.

Sylvania Cross-Reference

A useful equivalent description is:

Sylvania T5 Circline Plus 22W/840

When replacing an older Sylvania circular fluorescent lamp, confirm that the existing lamp is also:

22W • T5 • 2GX13 • 840 • 4000K • approx. 225mm

Important: Manufacturer references are provided as a replacement and identification guide. Always confirm wattage, base, pin configuration, colour temperature and physical dimensions before ordering.

Common Applications

The 2GX13 T5 22W 840 Circline fluorescent lamp is commonly used in compatible:

• Circular ceiling fittings
• Kitchens
• Bathrooms
• Utility rooms
• Apartment common areas
• Offices
• Retail interiors
• Hospitality environments
• Reception areas
• Task-lighting fixtures
• Slimline ceiling luminaires
• Specialist circular fluorescent fittings

The slim T5 ring design provides broad illumination while allowing the lamp to fit into relatively shallow fixtures.

How to Identify the Correct Replacement

Before ordering, check the markings printed on your existing circular fluorescent tube.

For this product, look for:

22W + T5 + 2GX13 + 840 + 4000K

You may also find:

22W/840

MASTER TL5 Circular 22W/840

2GX13

840

4000K

or another manufacturer-specific model number.

Also measure the outside diameter.

For this product:

Outside Diameter: Approx. 225mm

Tube Diameter: Approx. 16mm

What Does 840 Mean?

The 840 colour code is an important identification number when replacing fluorescent lamps.

8 = CRI approximately 80+

40 = approximately 4000K colour temperature

Therefore:

840 = CRI 80+ / 4000K Cool White

This is useful because an older fluorescent lamp may simply show 840 without explicitly printing 4000K.

If your existing lamp says 22W/840, it indicates a 22W lamp with approximately 4000K Cool White light.

You should still confirm the 2GX13 base and physical diameter before ordering.

2GX13 4-Pin – Important Compatibility Information

This product uses a 2GX13 4-pin base.

For this product, confirm:

✓ 22W

✓ T5 Circline

✓ 2GX13

✓ 4-Pin

✓ 840

✓ 4000K Cool White

✓ Approx. 225mm outside diameter

Do not choose a circular replacement based only on wattage or ring shape.

840 / 4000K Cool White Light

The 840 / 4000K Cool White colour provides a clean, neutral-white appearance ideal for functional and commercial environments.

Common applications include:

• Kitchens
• Bathrooms
• Offices
• Retail areas
• Hallways
• Apartment common areas
• Utility rooms
• Work areas
• Reception spaces
• General-purpose ceiling lighting

Compared with 830 / 3000K Warm White, 840 provides a noticeably cleaner and cooler-looking light.

If you're replacing one lamp in an existing installation, check for 840 or 4000K on your existing tube to maintain a similar light appearance.

Hard-to-Find 22W Circline Replacement

Traditional T5 circular fluorescent lamps are becoming harder to source as older fluorescent ranges are phased out.

If your existing fitting is still operating correctly, replacing the lamp with the correct 22W 2GX13 T5 Circline tube can allow you to continue using the existing fixture without replacing the complete fitting.

Keep your old lamp until you have confirmed the replacement.

Need Help Finding the Correct Circline Lamp?

If you're unsure whether this 22W T5 2GX13 840 Circline lamp is the correct replacement, send NZ Lights a clear photo of your existing lamp showing the printed markings and connector/base.

If possible, also provide the outside diameter.

We can help identify the correct wattage, base, colour code, colour temperature and physical size required for your fitting.

Why Buy from NZ Lights?

NZ Lights specialises in replacement lamps and hard-to-find lighting products for residential, commercial and professional applications throughout New Zealand.

• Specialist replacement lighting range
• Hard-to-find Circline fluorescent lamps
• 2GX13 circular lamps available
• Replacement options for discontinued lamp ranges
• Multiple wattages and colour temperatures
• Single and bulk quantities available
• NZ-based product support
• Fast nationwide delivery
• Daily dispatch from Christchurch, New Zealand