The choice between LED and halogen bulbs for daytime running lights (DRLs) in a Subaru WRX depends on various factors, and both options have their advantages and considerations. Here are some points to consider:

LED Daytime Running Lights:

1. Energy Efficiency: LEDs are generally more energy-efficient than halogen bulbs, meaning they can provide the same or even better brightness while consuming less power.
2. Longevity: LEDs typically have a longer lifespan compared to halogen bulbs. They can last significantly longer, which can be beneficial in terms of maintenance and replacement costs.
3. Brightness: LEDs are known for their brightness and clarity, which can enhance visibility during the day.
4. Color Options: LEDs often come in different color temperatures, allowing you to choose a color that suits your preference or matches the overall look of your Subaru WRX.
5. Instant Illumination: LEDs light up instantly when turned on, without the warm-up time required by some halogen bulbs.

Halogen Daytime Running Lights:

1. Cost: Halogen bulbs are generally more affordable than LEDs, making them a cost-effective option, especially for those on a budget.
2. Easy Replacement: Halogen bulbs are widely available, and replacement is usually straightforward, requiring no additional modifications.
3. Widely Compatible: Halogen bulbs are a common and standard lighting option in many vehicles, ensuring broad compatibility and ease of finding replacement bulbs.
4. OEM Standard: Many vehicles, including some Subaru models, come equipped with halogen bulbs as the standard DRLs, so choosing halogen can maintain the original look.