Are these bulbs legal for headlight use?

In the USA, these LED bulbs are legal for fog light use only. They do not comply with DOT / FMVSS108 and are not street legal for headlights. Always check local laws regarding automotive lighting.

What is TST LED technology?

TST, or Thermal Separation Technology, uses LEDs with electrical connections on the top. This lowers thermal resistance, allowing the SL2 Pro to run at higher power levels than traditional LED bulbs, while maintaining focus.

How does the internal fan stay clean?

The fan is sealed inside the housing, which protects it from dust and moisture. This design choice maximizes cooling efficiency and promotes long-term reliability.

Diode Dynamics 9005/9011/H10 White SL2 Pro LED Bulbs (pair)

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Diode Dynamics

Diode Dynamics 9005/9011/H10 White SL2 Pro LED Bulbs (pair)

Name: Diode Dynamics 9005/9011/H10 White SL2 Pro LED Bulbs (pair)
Brand: Diode Dynamics
Price: 225.23 USD
Availability: InStock

$225.23

Direct replacement LED bulbs with improved output and internal cooling. For fog light use only.

Key Features

Advanced TST LED Technology — allows higher power levels while maintaining focus
Internal cooling — provides maximum cooling efficiency and long-term reliability
Fully integrated design — no wires or external drivers
Direct replacement bulb — compact fitment

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more