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BRIGHT 21W AMBER SIGNAL OUTPUT - Produces clear orange illumination for strong daytime and night-time turn signal visibility. WY21W 585 / 382WA FITMENT – W3x16D CAPLESS BASE - Designed for vehicles requiring 12V 21W amber capless indicator bulbs. Always confirm bulb marking before purchase. E-MARKED ROAD LEGAL COMPLIANCE - Fully E approved for legal UK and EU road use, supporting MOT compliance and dependable signalling. BOX OF 10 FOR SERVICING & BULK USE - Ideal for garages, fleet maintenance and multi-vehicle households needing reliable spare indicator bulbs. CONSISTENT PERFORMANCE & VALUE - Cost-effective bulk pack delivering dependable automotive lighting without premium brand pricing.