J.W. Speaker Direct-Fit LED H4 – 999004

H4 / P43t dual-beam • 12/24V multivolt • twin pack

Product Overview

The J.W. Speaker 999004 is a direct-fit H4 (P43t/H19) LED upgrade that mirrors halogen bulb sizing for a tidy, plug-and-play install. It produces a crisp white beam with a controlled low-beam cutoff in quality reflector or projector housings, and it runs on both 12V and 24V systems with no external driver boxes.

Key Features

  • Direct H4 fit: Standard P43t base — remove halogen, insert LED, reconnect.
  • Clean output: ~2000 lumens per bulb at 5700K for modern, daylight-style colour.
  • Compact thermal design: TST alloy-shaft heat path for stable performance.
  • Durable build: IP65 ingress protection; wide −40 °C to +130 °C operating range.
  • Multi-voltage: Works on 12/24V passenger, 4WD and light commercial vehicles.
  • Warranty: 2-year warranty.
  • Pack format: Twin pack.

What’s in the Box

  • 2 × H4 LED headlight bulbs (Hi/Lo)
  • Integrated in-globe drivers
  • Quick start guide

Compatibility

  • Socket/base: H4 / P43t (dual-beam low/high)
  • Electrical: 12–24V multivolt
  • Housings: Quality H4 reflector or projector headlights
  • Vehicle electronics: Some vehicles may require a CANBUS adaptor to prevent bulb-out warnings
  • Regulatory: Not approved as a legal halogen replacement in regulated markets

Technical Specifications

Part Number
999004
Base / Socket
H4 / P43t (H4-H19)
Supply Voltage
12–24V DC
Luminous Flux
≈ 2000 lm per bulb
Colour Temperature
5700K (cool white)
Ingress Protection
IP65
Operating Temp
−40 °C to +130 °C
Thermal Design
TST alloy-shaft; internal driver
Pack Quantity
Twin pack (2 bulbs)
Warranty
2 years

Why Choose This Kit?

It’s a simple, tidy H4 LED upgrade that prioritises a controlled beam pattern, a neutral 5700K colour and robust, road-ready construction. The compact, driver-in-globe design makes it a practical fit for most H4 housings and dust caps.

Warranty 24
Model # 999004
Barcode # 00750958177995

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Is the H4 999004 legal for road use?
The 999004 is a retrofit LED for H4 halogen housings and is not approved under ADR/ECE/DOT as a halogen replacement. Check your local regulations before on-road use.
Will it fit my vehicle?
If your headlight takes an H4 / P43t (H4-H19) bulb and there’s adequate space behind the dust cap, it’s a direct fit. The pack is a twin pack (two bulbs).
Do I need a CANBUS adaptor?
Many vehicles work plug-and-play. Some with sensitive lamp monitoring may show a bulb-out warning and need a CANBUS adaptor. Symptoms include dash errors or flicker.
Is it suitable for reflector and projector housings?
Yes. It’s designed for quality H4 reflectors and projectors. Always verify beam aim after installation to maintain a clean cutoff and reduce glare.
How bright and what colour is the light?
Approx. 2000 lumens per bulb with a neutral 5700K colour temperature for crisp, white light.
Does it work on both 12V and 24V systems?
Yes. It’s a multivolt design that operates on 12V and 24V electrical systems.
What is the IP rating and temperature range?
The bulbs are IP65 rated and tested for a wide operating range of −40 °C to +130 °C.
Does it use a cooling fan?
No external fan. The compact TST thermal path and internal driver manage heat while keeping the footprint small for dust caps and tight housings.
Can I use this on a motorcycle with an H4 socket?
Yes, if the bike uses an H4/P43t socket and has enough space behind the headlight. Note the kit is a twin pack; some riders keep the spare as a backup.
What’s the warranty period?
2 years.

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