The Diode Dynamics H4 SL2 Pro LED Bulb gives customers a clean way to replace compatible factory halogen lighting with a compact LED upgrade. This single-bulb replacement is designed around the H4/9003 bulb fitment, making it a strong choice for customers who want higher-output forward lighting performance without adding external lighting housings.
The SL2 Pro design uses an internal driver and an OEM-size plug-and-play connector, helping simplify installation inside compatible factory housings. The bulb keeps the upgrade focused on useful forward visibility, modern color temperature, and a cleaner lighting appearance compared with older incandescent or halogen bulbs.
SL2 Pro bulbs use Thermal Separation Technology LEDs, a fully integrated body, and internal cooling to support stronger output in a small package. The top-mounted fan locations cooling close to the LED emitters, while the compact housing helps reduce the extra wiring and driver bulk often associated with traditional LED bulb conversions.
This bulb is rated at Low Beam: 1370 High Beam: 2040 (per bulb) output with 6000K cool white color temperature, 22 watts of input power, and 9-30V operating voltage. The operating temperature range of -40C to 85C (-40F to 185F) helps support dependable use across changing weather, seasonal driving, and work or trail conditions.
The one bulb format is useful when customers need to replace one failed or upgraded bulb, complete a matched pair, or match the selected vehicle application. Customers should confirm bulb size, housing clearance, and the intended lighting position before installation.
Whether customers are upgrading for nighttime visibility, fog light performance, backroad driving, worksite use, or a cleaner modern lighting appearance, the Diode Dynamics H4 SL2 Pro LED Bulb delivers a focused LED replacement with Diode Dynamics engineering. Now Available at LEER!
Features & Specifications
Product Type: LED replacement bulb
Brand: Diode Dynamics
Series: SL2 Pro
Bulb Size: H4/9003
Quantity: One bulb
Measured Output: Low Beam: 1370 High Beam: 2040 (per bulb)
Color Temperature: 6000K
Input Power: 22 watts
Operating Voltage: 9-30V
Operating Temperature: -40C to 85C (-40F to 185F)
LED Technology: TST automotive-grade LED with integrated top-mounted cooling fan
Cooling Style: Integrated top-mounted cooling fan
Connector Style: OEM-size plug-and-play connector
Finish: Clear
Fitment: Universal bulb-size fitment depending on selected vehicle application
Functionality:
- Swaps in for compatible factory halogen bulbs with LED output
- Adds a cleaner cool white lighting appearance
- Supports forward lighting upgrades in compatible housings
- Uses a compact integrated driver design for easier packaging
- Helps improve visibility for fog light, off-road, work, and auxiliary lighting use
- Works with vehicle-specific bulb-size matching
- Supports plug-and-play style installation in compatible applications
Why Choose
This product is ideal for customers who want higher-output forward lighting performance.
- Thermal Separation Technology supports stronger output and efficient heat control
- LED output gives compatible vehicles a more modern lighting appearance
- Optical focus is designed to support a usable beam pattern
- Plug-and-play style connector helps simplify the upgrade process
- Durable construction supports demanding vehicle environments
- Cool white color temperature pairs well with many modern lighting setups
- Single and pair formats help match the way customers maintain or upgrade their vehicle
What's Included
- Diode Dynamics SL2 Pro LED bulb
- Hex tool
- Installation instructions
Note: Confirm included components before installation.
Installation Notes
- Confirm the selected bulb size matches the factory bulb location before installation
- Installation generally involves removing the factory bulb, connecting the LED bulb, testing function, and reinstalling any removed covers or panels
- LED replacement bulbs are legal in the USA for fog light use only and are not street legal for headlight use in the USA
Buyer is responsible for use in accordance with applicable vehicle, road, off-road, towing, racing, and local laws.
Warranty Information
Diode Dynamics lighting products are commonly backed by a limited lifetime warranty on select products, with warranty support focused on defects that occur under normal use.
Warranty coverage typically excludes improper installation, misuse, modifications, electrical issues, tampering, impact damage outside warranty terms, or non-compliant use. Proof of purchase may be required for warranty claims.
