Perfect for PWM: Many vehicles run the high beam headlamps at reduced power to provide the DRL function. This is usually done by what's called PWM: Pulse Width Modulation. Instead of a constant, steady feed of electric current, the bulbs are fed a stream of very brief pulses of power averaging 50% of the steady-feed voltage. It's done this way because the maximum safe, effective and legal brightness for a DRL is much lower than the minimum for a high beam headlamp. It looks terrible, but it meets legal requirements, it's cheap to install, and that's pretty much all the automakers care about.
The Problem with LED + PWM: LEDs bulbs are different than halogen bulbs. They're instant-on and instant-off, so PWM feed doesn't dim them--it just makes them flicker, which is not only noticeable and annoying, it's also illegal. Many companies claim you can fix the problem by using what they call a "canbus decoder" or capacitor-based "anti-flicker" module to solve the problem, but that's wrong. Some of those devices may eliminate flicker, but your daytime running lights will operate at full high beam intensity and produce lots of glare during the day and dusk--don't be that guy!
The Proper Solution: The all-new Xtreme Pro DRL Driver, designed and engineered in house and available exclusively from XenonDepot, is a smart two-stage LED headlight bulb driver that enables flicker-free true OEM-style dual-intensity DRL and high beam functionality for our line of Xtreme Pro LED bulbs. When the vehicle calls for daytime running lights, the Xtreme Pro DRL Driver powers the bulbs at 12% of full intensity--with zero flicker. You get lights that function correctly, the way they're supposed to, with perfect true-white light in both modes.
Installation: You're not going to need any additional modules, canbus components, jumper wires, or anything else. Already have an Xtreme Pro LED kit? The Xtreme Pro DRL Driver is a simple 1:1 drop-in replacement for the standard 9005 Xtreme Pro driver. Simply remove your current Xtreme Pro driver (and any anti-flicker devices you might have installed) and install the Xtreme Pro DRL Driver. Have a different type or brand of LED kit? Sorry, this driver won't work for you--it's engineered specifically for the XenonDepot Xtreme Pro LED series.
Will it work on my car? We've specifically designed this product around the 5th-generation Toyota 4Runner 9005 high beam / DRL application, but many other vehicles use a similar PWM power signature for DRL mode. We're busily working to compile a database of validated applications.