Are these bulbs street legal?

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

What is TST LED technology?

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

Do these bulbs come with a warranty?

Yes, these Diode Dynamics SL2 Pro LED bulbs are backed by a limited lifetime warranty. This covers defects in materials and workmanship. Refer to the manufacturer's warranty documentation for specific details and limitations.

Diode Dynamics

Diode Dynamics H11/H8/H9 White SL2 Pro LED Bulbs (pair)

Name: Diode Dynamics H11/H8/H9 White SL2 Pro LED Bulbs (pair)
Brand: Diode Dynamics
Price: 225.23 USD
Availability: InStock

$225.23

Next-gen LED bulbs with integrated cooling and more light output than previous models. Direct fit.

Key Features

TST LED Technology — allows higher power levels while maintaining focus
Internal Cooling — sealed fan provides maximum cooling efficiency
Direct Replacement — compact, wire-free design for easy install
Correct Optical Focus — engineered to match the original beam pattern
Well-built — designed and engineered in the USA
Backed by limited lifetime warranty

⚠️ 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