GTMOTO D4S HID Bulbs for Lexus IS250 IS350 — 6000K Cool White, Pair for OEM Xenon Low Beams

GTMOTO D4S HID bulbs are a direct-fit xenon low-beam replacement designed to brighten and modernize compatible Lexus IS-series bi-xenon headlamp assemblies.

These D4S gas-discharge bulbs are made for Lexus models equipped with factory HID low beams (bi-xenon/AFS systems) and provide a cooler white 6000K output for clearer, farther illumination compared with older, yellowish stock lamps. They require an AC-type ballast and are not compatible with halogen or reflector-style headlamps; fitment is specific to D4S-basis housings on many 2006–2016 IS variants. Built from quartz anti-UV glass, ceramic insulation, and stainless mounting hardware, the set comes as a pair and installs without cutting or modification.

Will these bulbs fit my Lexus IS250 or IS350 low beams?

If your vehicle has factory D4S xenon low-beam headlamps (bi-xenon/AFS), these are a direct replacement that plugs into the original socket. They will not work in halogen or reflector-style lamps and require a compatible ballast to operate correctly.

• Compatible with D4S-equipped IS250, IS350, IS250C, IS350C low-beam assemblies
• Not compatible with halogen base models or H11-style bulbs
• Requires AC ballast; do not attempt DC-only wiring swaps
• Designed for OEM-style bi-xenon and adaptive headlamp housings

How much brighter and whiter will the light be?

These GTMOTO bulbs are tuned for a cool white 6000K color temperature that reads as a crisp daylight shade on the road. Brightness and perceived contrast are improved versus yellowish 4300K or halogen lamps, helping make road markings and signs easier to see at night.

• 6000K cool white tone for clearer visual contrast
• Higher lumen output than many stock older xenon bulbs
• Instant arc ignition for immediate light without warm-up
• Engineered anti-UV quartz glass to resist discoloration

How easy is installation and what should I prepare?

Installation is intended to be plug-and-play into OEM D4S sockets with no modifications for most compatible Lexus headlamp assemblies. Expect a straightforward swap that takes about ten minutes per side if you have basic tools and access to the headlamp housing.

• OEM-standard D4S base — no cutting or rewiring in most cases
• 2 bulbs per set, packaged for safe delivery and handling
• Verify your car already has HID ballasts before ordering
• Use gloves or clean cloth to avoid touching the quartz capsule

Are these bulbs durable and what materials are used?

The lamps are manufactured with a focus on longevity and stable performance: laser-cut quartz anti-UV glass, ceramic insulating tubes, and stainless metal mounting components. Those materials reduce risk of premature yellowing and give stable operation under standard driving conditions when used with proper ballasts.

• Quartz anti-UV glass resists heat-related discoloration
• Ceramic insulation for reliable electrical isolation
• Stainless steel bracketing for secure fitment in the socket
• Manufactured for consistent xenon arc ignition and life

Who is this for: Drivers of Lexus IS models that already have factory D4S bi-xenon low-beams who want a cleaner, cooler white light and a straightforward, OEM-style replacement. Do not buy these bulbs for halogen or reflector headlamp variants, or for vehicles lacking compatible ballasts. If your goal is a direct-fit, brighter xenon low beam with modern color tone and reliable construction, this GTMOTO D4S pair is built for that application.