LED Bulb Upgrade Kit (Negative Earth) – Sprite Mk1 Frogeye

What is this kit?

This LED bulb upgrade kit converts the exterior and interior lighting on a Sprite Mk1 Frogeye to warm white LEDs. It is supplied as a matched set for cars retaining a positive earth electrical system and includes the correct indicator relay for LED operation.

Key benefits

• Clearer signalling: improved visibility from brake lights, indicators and sidelights in modern traffic.
• Reduced electrical load: LEDs draw less current than filament bulbs, easing demand on the charging system.
• Warm white colour: avoids a modern blue-white appearance and suits period lenses.
• Correct indicator operation: LED-compatible relay included to maintain a stable flash rate.

Limitations: Dash illumination dimming may be reduced compared with incandescent bulbs. LEDs are less tolerant of poor earth connections, which should be addressed during installation.

Will it fit my Sprite?

Yes – this kit is intended for the Sprite Mk1 Frogeye running a positive earth system.

• Suitable for standard Mk1 exterior and interior lamp holders.
• Not suitable for negative earth cars (use XLTG241).
• Not suitable for headlamp bulbs.

What’s included

• Warm white LED replacement bulbs for exterior lighting.
• Warm white LED bulbs for interior and instrument illumination.
• LED-compatible indicator relay for positive earth systems.

Headlamp bulbs are not included and are supplied separately if required.

Technical details

• Colour temperature: warm white.
• Fittings: bayonet-style replacements for standard bulb holders.
• Electrical: positive earth only.

Installation notes

• Direct bulb replacement in original holders.
• Indicator relay must be replaced with the supplied LED-compatible unit.
• Clean bulb holders and earth points during installation to avoid flicker or intermittent operation.
• Confirm correct operation of all lights after fitting.

Why choose this kit?

This kit provides a complete, polarity-correct solution rather than mixing individual LED bulbs. Supplying the correct relay avoids common indicator issues seen with piecemeal LED conversions.

FAQs