Diode Dynamics DD0640S H11/H8/H9 White SL2 Pro LED Fog Light Bulb with AntiFlicker Module (Single)

The Diode Dynamics DD0640S is a single H11/H8/H9 White SL2 Pro LED replacement bulb bundled with an AntiFlicker module — a direct plug-and-play upgrade over your factory halogen fog light or auxiliary bulb. Designed and engineered in the USA, the SL2 Pro represents a major advancement over the previous SL1 and SLF generations, delivering significantly higher output with precision optical focus.

Next-Generation TST LED Technology:

The SL2 Pro is built around Thermal Separation Technology (TST) LEDs. Unlike conventional LED chips, TST LEDs place electrical connections on the top of the chip, dedicating the entire bottom surface to channeling heat away from the LED core. This lowers thermal resistance, allowing the bulb to operate at higher sustained power levels than traditional LED bulbs while maintaining focus and long-term reliability.

Optimized Optical Focus:

High lumen numbers mean nothing without a focused beam. The SL2 Pro is engineered to emit light from the same focal point as the original halogen bulb, preserving your housing's designed beam pattern. The result is a stronger hotspot with increased distance and visibility — without adding glare to oncoming traffic. Rather than using the smallest possible LEDs (which can cause streaks and harsh cutoffs), Diode Dynamics optimized the SL2 Pro for a smooth, comfortable, and correctly focused beam.

Internal Cooling System:

The SL2 Pro features an integrated top-mounted fan sealed inside the housing, placing active cooling directly at the heat source. Because the fan is fully sealed, there are no concerns about dust or moisture intrusion over time. This design eliminates the inefficiency of traditional heat-pipe systems that move heat to the bottom of the bulb before cooling it.

Fully Integrated, Wire-Free Design:

Unlike many LED conversion kits, the SL2 Pro has no external drivers or hanging wires. The compact, self-contained design fits cleanly inside your housing without any tucking or routing of extra components.

Key Features:

• Advanced TST (Thermal Separation Technology) LED for higher power and superior thermal management
• Optimized optical focus — matches factory beam pattern with increased output
• Integrated top-mounted sealed cooling fan for long-term reliability
• Fully integrated design — no external wires or drivers
• Direct plug-and-play replacement for H11, H8, and H9 halogen bulbs
• AntiFlicker module included — prevents bulb-out warnings and flickering on compatible vehicles
• Full metal construction with copper-core circuit board
• Transient protection against electrical spikes; compatible up to 30V
• Tested from -40°C to +85°C (-40°F to 185°F) in environmental cycling chambers
• Backed by a limited lifetime warranty
• Designed and engineered in the USA (Patents Pending)

Application Notice: LED bulbs are legal in the USA for fog light use only. This product is not compliant with DOT/FMVSS108 and is not street legal for headlight use in the USA. Legal for off-road use including ATV, snowmobile, and off-road racing applications. International legality varies by country.