Description

PHILIPS 13311C1 Truck Bulb, Worklight

Your H2 worklight is dead. Or the fog lamp is out. Or your old stock of X511 bulbs is empty. The PHILIPS 13311C1 truck bulb, worklight fixes it. £9.49 each. 24V. 70W. H2 with X511 base. Boxed. Genuine Philips.

What Is the PHILIPS 13311C1 Truck Bulb, Worklight?

  How the H2 X511 Worklight Bulb Works

The 13311C1 is a 24V H2 halogen bulb with X511 base. 70W output. Single filament. The X511 base is a metal shell with locating tabs — different from standard PK22s or BA15s. It fits specific commercial worklights, fog lamps, and auxiliary driving lamps. Philips halogen technology gives you bright white light at full operating temperature within 0.5 seconds .

  Why H2 Worklight Bulbs Fail

Two reasons. First, halogen cycles naturally deplete over 500 to 800 hours. Second, 24V commercial systems see voltage spikes to 28V during cold starts. The 13311C1 handles both. Philips builds to ECE regulations for H2 lamp type .

13311C1 Truck Bulb, Worklight — Full Specifications

PHILIPS 13311C1 Truck Bulb, Worklight — Compatibility

 Confirming Fitment

Fits any 24V worklight, fog lamp, or auxiliary driving lamp that takes H2 bulbs with X511 base. Confirmed fitment on Renault Trucks Magnum and Midliner models for fog lamp applications . Also fits older DAF, Volvo, Scania, MAN, and Mercedes commercial vehicles with H2-based auxiliary lighting.

Check ECE R37 regulations for filament lamps — H2 is an approved lamp category for fog and auxiliary driving lamps.

 Cross-Reference Table

Worklight — When and Why to Replace

 13311C1 Symptoms — What to Watch For

Symptom one — Worklight or fog lamp completely dead. No light output. The halogen filament has snapped. Your visibility in fog or at night is compromised.

Symptom two — Dim yellowish light. The bulb is near end of life. Halogen gas has depleted. Light output has dropped 40% from new. Replace before it fails completely.

Symptom three — Black or cloudy glass envelope. Tungsten evaporation inside the bulb. The bulb has reached its natural end. Continued use risks glass cracking from thermal stress.

 Fix 24V Worklight Failure — Replace with Philips H2 X511

Don’t guess with unbranded H2 bulbs. Philips halogen technology gives you consistent colour temperature and full rated life. The 13311C1 is boxed and protected. No loose bulbs rattling around your workshop drawer .

Why Choose the PHILIPS 13311C1 Truck Bulb, Worklight?

  X511 base — correct fitment for H2 applications

The X511 base has specific locating tabs. Cheaper substitutes use generic bases that fit loose. The 13311C1 fits tight. No vibration loosening. No intermittent connection. Your worklight stays on.

  70W halogen output — 1900 lumens brightness

Philips H2 24V lamps produce approximately 1900 lumens at 70W . That is bright enough for fog penetration and close work. Not so bright that it creates glare back into the cab.

 Philips OEM quality — not budget aftermarket

Philips supplies original equipment to truck manufacturers worldwide. The 13311C1 meets the same standards as factory-fit lamps. Philips automotive lighting division tests every production batch. Budget bulbs do not.

Buy PHILIPS 13311C1 Truck Bulb, Worklight Online

£9.49 each. Genuine Philips in factory box. Same-day dispatch. Buy a pair — H2 lamps are often fitted in pairs on commercial vehicles. Keep one spare in the truck. When a fog lamp fails at 4am in thick mist, you have the worklight fix.

Installing the PHILIPS 13311C1 Truck Bulb, Worklight

  Step-by-Step 13311C1 Fitting Guide

1. Isolate the lighting circuit. Turn off the worklight or fog lamp switch.

2. Remove the lamp housing lens or rear access cover. Usually screws or clips.

3. Unplug the wiring connector from the back of the old H2 bulb.

4. Release the retaining clip or spring holding the old bulb in the housing.

5. Remove the old bulb from the X511 base socket.

6. Hold the new 13311C1 by the metal base only. Never touch the quartz glass.

7. Insert the new bulb into the X511 socket. The locating tabs align with slots.

8. Re-engage the retaining clip or spring over the base.

9. Reconnect the wiring plug to the bulb terminals.

10. Test the lamp before refitting the lens.

11. Refit the lens or cover. Ensure the rubber seal is seated correctly.

Critical: Skin oil on halogen glass creates a 400°C hot spot. The bulb will crack within the first hour. Use gloves or a clean cloth. If you touch the glass, clean with isopropyl alcohol before fitting.

Professional fitting time: 5 minutes.

FAQs

What is the difference between H2 and H3 worklight bulbs?

H2 uses X511 base — a metal shell with locating tabs. H3 uses PK22s base — a ceramic body with flying lead. They are not interchangeable. Check your old bulb before ordering. The 13311C1 is H2 with X511 base.

Is the 13311C1 suitable for headlight use?

No. H2 lamps are approved for fog lamps and auxiliary driving lamps only. Main beam or dipped beam headlights require H4, H7, or other ECE-approved headlight types. Use the correct lamp for your application.

Will this fit my 12V truck?

No. This is a 24V bulb only. Fitting to 12V produces very dim output — approximately 25% of designed brightness. The halogen cycle may not activate properly. Order a 12V H2 bulb for 12V systems.

What does the C1 suffix mean in 13311C1?

The C1 suffix indicates boxed packaging with Philips part number coding. The base bulb specification is identical to other Philips H2 24V 70W references.

My old H2 bulb has a different brand. Will the 13311C1 fit?

Yes. H2 with X511 base is standardised across manufacturers. Philips 13311C1 fits any lamp housing designed for H2/X511 bulbs regardless of the original brand.

Complete the Service

While replacing the worklight or fog lamp bulb, check these related items:

• PHILIPS 13311C1 — matching bulb for the opposite side fog lamp

• Lamp housing rubber seal — replace if cracked to prevent water ingress

• Dielectric grease — apply to X511 base tabs to prevent corrosion

• Lens cleaning solution — remove road film from the outer lens