Diode Dynamics H4 White SL2 Pro LED Bulbs, Part Number dioDD0492P

Features Advanced TST LED Technology for industry-leading performance. Internal cooling for superior reliability. Fully integrated design, no wires or external drivers. Direct replacement bulb with compact fitment. Backed by limited lifetime warranty. Designed and engineered in USA (Patents Pending). Introducing the SL2 Pro LED Bulb! As a replacement for the popular SL1 LED bulb, the new SL2 Pro LED features some major upgrades: next-generation TST LED technology, an integrated top-mount fan, and a fully-integrated, wire-free design. As a direct plug-and-play replacement, it provides a significant increase in output, in a compact package. Next-Generation TST Technology. The SL2 Pro features new thermal separation technology (TST) LEDs. TST LEDs are designed with electrical connections on the top which lowers thermal resistance, allowing the SL2 Pro to run at higher power levels than traditional LED bulbs, while maintaining focus. Correct Optical Focus. The SL2 Pro LED bulb was engineered to focus light just like your original bulb, matching the original beam pattern while providing an increase in total output. Instead of using the smallest LEDs possible which can lead to streaks, lines, and harsh cutoffs, the SL2 Pro was optimized to provide a smooth beam pattern, while maintaining focus. Internal Cooling. The SL2 Pro features an integrated top-mounted fan which provides maximum cooling efficiency, superior thermal management and long-term reliability. Since the fan is sealed inside the housing, there's no concerns about damage from dust or moisture over time. NOTE: LED bulbs are legal in the USA for Fog Light use only. Not compliant with DOT / FMVSS108 and not street legal in the USA for Headlights. International legality varies by country. Introducing the SL2 Pro LED Bulb! As a replacement for the popular SL1 LED bulb the new SL2 Pro LED features some major upgrades. Included in the box: Two (2) LED Bulbs

• Molded construction with sturdy double terminals
• Direct replacement for your factory bulb
• Increased output with LED Appearance
• Plug and play simple installation

The Diode Dynamics H4 White SL2 Pro LED Bulbs are a direct plug-and-play replacement for compatible factory H4 bulbs. Part number dioDD0492P, this two-bulb set uses next-generation Thermal Separation Technology (TST) LEDs to deliver increased output with a clean LED appearance while maintaining a beam pattern similar to the original bulb. The compact, fully integrated design eliminates external drivers and wiring for a straightforward installation.

An integrated top-mounted fan provides efficient internal cooling and helps manage operating temperatures for improved long-term reliability. The sealed cooling system helps protect the fan from dust and moisture, while the molded construction and sturdy double terminals support dependable fitment. Each bulb is engineered for smooth optical focus, avoiding excessive streaking, harsh cutoffs, and unwanted beam distortion associated with poorly focused LED conversions.

Important legal notice: These LED bulbs are intended for fog light use only in the United States. They are not compliant with DOT or FMVSS 108 requirements and are not street legal for headlight use in the USA. International legality varies by country. Verify bulb type, vehicle compatibility, and local regulations before installation. Designed and engineered in the USA, the SL2 Pro is backed by a limited lifetime warranty.

What's Included: Two Diode Dynamics H4 White SL2 Pro LED bulbs. Installation is plug-and-play when the vehicle uses compatible H4 bulb sockets; additional fitment components may be required for certain applications.

Features:

• Advanced TST LED technology: Provides increased output and efficient thermal performance while maintaining optical focus.
• Integrated internal cooling: Features a sealed, top-mounted fan for improved heat management and long-term reliability.
• Fully integrated construction: Eliminates external drivers and wiring for a clean, compact replacement design.
• Direct plug-and-play replacement: Installs into compatible factory H4 sockets and includes two LED bulbs for a complete pair.

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1