A 18/18W BAY15d globe is a dual-filament bulb commonly used in motorcycles, scooters, ATVs and some older vehicles for headlights, tail/stop lights, or park/indicator combinations depending on the housing.

Here’s a quick breakdown: What “18/18W” means

• Two filaments, each rated at 35 watts • Usually for high beam / low beam in small-frame bikes or scooters  What “BAY15d” means

• B = Bayonet base • A = Automotive • Y15 = 15 mm diameter base

• d = dual-contact, dual-filament • Offset pins are not straight across they’re staggered to prevent incorrect fitment Common Uses

• Small motorcycle headlight bulbs (e.g., postie bikes, scooters, PW/CRF/TTR style farm bikes)

• Tail/brake lights in some older models

• ATVs using dual-filament bayonet housing Upgrade or replace your motorcycle, scooter, or ATV lighting with this reliable 18/18W BAY15d dual-filament globe, designed for a wide range of applications including stop/tail lights, running lights, park lights and small headlight assemblies. Built with the standard BAY15d 15mm bayonet base featuring dual contacts and staggered offset pins, this bulb provides a secure fit and stable illumination across multiple lighting functions. With its low-wattage 18/18W design, this globe is perfect for vehicles with smaller charging systems such as postie bikes, scooters, farm bikes, ATVs, and older motorcycles. It delivers consistent, dependable light output whether used as a tail/brake globe, headlight, or auxiliary light, making it a versatile and essential replacement bulb for many models. Key Features

• 18/18W dual-filament bulb suitable for multiple lighting purposes • BAY15d base – 15mm bayonet, dual contact, staggered pins

• Suitable for stop/tail lights, running lights, park lights, and small headlights • Low-heat, low-draw design ideal for small motorcycles and scooters

• Bright, stable illumination for improved visibility and safety • Direct replacement for standard 18/18W BAY15d bulbs

• Plug-and-play installation — no wiring modifications needed • Durable construction for long service life Perfect For

• Stop/tail light assemblies using a BAY15d dual-filament globe • Headlight units on small motorcycles and scooters • ATVs and farm bikes with low-output charging systems

• Postie bikes, classic bikes, delivery bikes, mobility scooters • Anyone needing a reliable, affordable replacement light globe