HMCYCI LED Headlight Bulbs for Honda Rancher TRX420/TRX500 34901-HR3-A21 6000K Cool White, 2-Pack 12–24V CSP 360° Output

HMCYCI 34901-HR3-A21 LED bulbs are direct-fit 6000K replacement headlights for Honda Rancher TRX420/TRX500 ATVs (2014–2022) that deliver bright, cool-white illumination with plug-and-play installation.

These two 34901-HR3-A21 LED units are built for off-road and utility use: they run on 12–24V, use CSP chips for 360° light output, and are housed in an aviation-grade alloy shell with an integrated constant-current driver. Designed to replace halogen bulbs without wiring changes, the lamps prioritize consistent light output, thermal management, and rugged construction for ATV and UTV lighting needs.

Will these bulbs fit my Honda Rancher TRX420 or TRX500?

They are made to match the 34901-HR3-A21 bulb footprint used by many Rancher models from 2014 through 2022. Always confirm the bulb type printed in your owner’s manual or on the existing lamp before buying.

• Compatibility: stated for Honda Rancher TRX420 and TRX500 (2014–2022).
• Fit: direct 2-pin plug; no modification required for proper sockets.
• Voltage range: 12–24V DC supports typical ATV electrical systems.

How bright and what color is the light?

The bulbs operate at a 6000K color temperature, producing a cool-white beam that enhances contrast and visibility in many low-light scenarios. CSP (chip-scale package) emitters are arranged for wide and even coverage, improving the usable field of view compared with older halogen lamps.

• Color temperature: 6000K cool white for crisp illumination.
• Power: high-output design (~80W effective system brightness per pair contextually).
• Beam pattern: 360° even emission with penetrating condensing optics.

What protects the LEDs and ensures long life?

Each bulb includes a built-in constant-current IC driver that regulates input and prevents voltage spikes from damaging the LEDs. The integrated aviation-grade metal-alloy housing provides efficient heat transfer so the CSP chips run cooler and maintain stable output over time.

• Driver: constant-current IC for stable performance and polarity decoding.
• Thermal management: alloy shell designed for rapid heat dissipation.
• Durability: solid construction suitable for ATV vibration and rough conditions.

How easy is installation and what’s included?

Installation is intended to be plug-and-play: the bulbs use a 2-pin connector that replaces the OE unit without altering wiring. The package contains two LED bulbs and is sized for quick front headlight or fog/driving light swap-outs in roughly ten minutes.

• Included: 2 x 34901-HR3-A21 LED bulbs per order.
• Installation time: typically about 10 minutes per side for direct replacement.
• Use cases: front headlight, fog light, or auxiliary driving light where the socket matches.

Who is this for? Riders, farm operators, and recreational ATV owners who need a brighter, whiter light than halogen and want a simple, maintenance-reducing upgrade will benefit most. These bulbs suit people who prefer plug-and-play replacements that improve nighttime visibility and resist heat and vibration. If you’re unsure about bulb compatibility, verify the existing bulb code (34901-HR3-A21) in your Rancher’s manual before purchasing.