Bulbs guides
13 guides
- Bulbs
W5W Bulbs Explained: The 501 Capless T10 Sidelight Bulb, Its Base, and How to Replace It
A W5W bulb is a 12-volt, 5-watt capless wedge bulb with a W2.1×9.5d glass base, sold under the UK trade number 501...
- Bulbs
W16W Bulbs Explained: The 921 Capless Reversing Bulb, Its Base, and How to Replace It
A W16W bulb is a 16-watt single-filament capless bulb on a W2.1×9.5d wedge base, used for reversing lamps, high-level brake lamps, and...
- Bulbs
Vehicle Bulb Types Explained: A Complete Reference by Code for New Zealand
A vehicle bulb is identified by an alphanumeric code that fixes its base shape, filament arrangement, wattage and rated voltage. The four...
- Bulbs
Why Do My Tractor Bulbs Keep Blowing: Common Causes and Fixes
A tractor bulb that keeps blowing has one of five root causes: charging-system over-voltage, vibration, wiring or earth faults, fitting damage (skin...
- Bulbs
R5W Bulbs Explained: The 207 BA15s Sidelight Bulb, Its Base, and How to Replace It
An R5W bulb is a 5-watt single-filament bulb on a large single-contact BA15s bayonet base, used for sidelights, tail lights, number plate...
- Bulbs
P21/5W Bulbs Explained: The 380 BAY15d Stop and Tail Bulb, Its Offset Pins, and How to Replace It
A P21/5W bulb is a 12-volt twin-filament bulb with a 21-watt filament for the brake light and a 5-watt filament for the...
- Bulbs
P21W Bulbs Explained: The 382 BA15s Single-Filament Bulb, Its Uses, and How to Replace It
A P21W bulb is a 12-volt, 21-watt single-filament bulb on a BA15s bayonet base, sold in the UK and by many brands...
- Bulbs
H7 Bulbs Explained: 477, 499, Equivalents and LED Rules in NZ
An H7 bulb is a single-filament halogen headlight bulb on a PX26d base with 2 connector pins. The standard 12-volt H7 is...
- Bulbs
Halogen Bulb Lifespan: What Affects It and How to Maximise It
A halogen bulb lasts between 500 and 1,000 hours of use in normal conditions. The figure is the rated life set by...
- Bulbs
H4 Bulbs Explained: The 472 P43t Dipped and Main Beam Headlight Bulb, and How to Fit It
An H4 bulb is a twin-filament halogen headlight bulb that gives both dipped beam and main beam from one bulb, on a...
- Bulbs
H4 vs H7 Bulbs: Differences, Uses, and Which One You Need
H4 and H7 bulbs are the two most common halogen headlamp bulbs fitted to tractors, telehandlers, and farm vehicles in New Zealand....
- Bulbs
H6W Bulbs Explained: The 434 BAX9s Sidelight Bulb, Its Offset-Pin Base, and How to Replace It
An H6W bulb is a 6-watt single-filament bulb on a BAX9s offset-pin bayonet base, used for sidelights, parking lamps, and interior lamps....






