The Diode Dynamics SL2 and SL2 Pro are different bulb designs. Start with the bulb base and intended application, then compare cooling, colour and electrical requirements. A higher output specification alone does not establish the best choice for your lamp.
Application note: Diode Dynamics identifies these replacement bulbs as noncompliant for public-road headlamp use in the United States. Fog-light and other applications still need to meet applicable local requirements. Check the intended installation before ordering.
What changes between SL2 and SL2 Pro?
For the H11-family pairs compared here, Diode lists the following specifications. These are manufacturer specifications, not BTS test results.
| Feature | SL2 H11-family pair | SL2 Pro H11-family pair |
|---|---|---|
| Cooling | Passive heatsink; no fan | Integrated top-mounted fan |
| Colour choices | Separate 6000K white or 3000K yellow versions | 6000K white |
| Listed white output | 1,400 lumens per bulb | 2,400 lumens per bulb |
| Listed power per bulb | 14 W | 22 W |
| Operating voltage | 9–30 V | 9–30 V |
Sources: Diode SL2 H11 pair and Diode SL2 Pro H11 pair. Check the exact product page for other bases rather than applying every specification across the range.
Choose SL2 when a fanless design or a separate yellow option suits a verified application. Consider SL2 Pro when you want its higher listed white output and have confirmed the installation requirements. Neither choice establishes a universal beam-pattern winner.
Match the lamp before comparing bulbs
Identify the lamp application you are changing, such as a fog light or another permitted use. Confirm the original bulb marking and the vehicle’s actual equipment. A year and model can have multiple lighting packages. Replacing a complete headlight assembly is a separate decision; a halogen replacement bulb is not automatically a replacement for an original LED assembly or HID system.
Then check space behind the bulb, the connector, retaining hardware and dust cover. A socket name helps narrow the selection; it does not settle every installation detail. If the existing bulb or housing differs from the expected specification, resolve that difference before buying.
Compare output with the right evidence
Lumens describe total light output. Lux describes illumination reaching a surface. They measure different things and cannot be compared directly.
For a meaningful bulb beam-test comparison, use the same housing, measurement distance, aim and operating temperature. We have not presented a BTS beam test here, and the specifications above should not be read as a percentage increase in visibility or a safety guarantee.
Shop the matching socket family
| Confirmed bulb family | SL2 | SL2 Pro |
|---|---|---|
| H11 / H8 / H9 | View SL2 pair | View SL2 Pro pair |
| 9005 / 9011 / H10 | View SL2 pair | View SL2 Pro pair |
| 9006 / 9012 | View SL2 pair | View SL2 Pro pair |
You can also browse LED bulbs by brand. Follow each product’s application requirements; a shared socket family is not a vehicle-fit guarantee.
Common questions
Does the yellow SL2 switch to white?
No. The white and yellow SL2 options discussed here are separate single-colour versions. Choose the colour you need when selecting the product.
Will I need an anti-flicker module?
That depends on the vehicle’s electrical system and application. Confirm the requirement for your installation; do not assume a module is always needed or that every installation is error-free without one.
Does a matching bulb base prove the bulb is legal for my application?
No. Physical compatibility and permitted use are separate checks. Review the product restriction and the requirements where the vehicle will be used.
Are the linked products single bulbs or pairs?
The six products linked above are pair listings. Check the selected product and colour before adding it to your cart.