GTR Lighting Carbide Series T10/194/168 LED Bulbs: The all new Carbide Series LED Bulb Upgrades from GTR Lighting are the next evolutionary step in affordable and bright LED lighting for your car or truck! This new style of LED bulb replacement uses 4 individual LED chips in a forward-facing pattern pattern to create a monstrous amount of light in a uni-directional beam. The new Carbide Series LED bulbs are designed to "work smarter, not harder" utilizing a super-efficient LED chip and driver design which allows for massive amounts of light at a very small power level usage. Usage: These bulbs are going to be way way way brighter than almost anything else you'll find in a T10/194 bulb. They are too bright to be used in most interior lighting application. Specifically designed for exterior use due to their brightness. They'll work fine inside a vehicle, but are so bright some of your passengers may not appreciate it. This is the next generation in smart LED lighting for cars and trucks, sold in pairs. These Carbide Series LED bulb upgrades from GTR Lighting are the best value on the market for exterior vehicle indicator lights. Constant Current Driver: The Carbide Series of LED bulbs from GTR Lighting are built using a state of the art Constant Current Driver inside the bulb. This allows them to be more reliable when used on vehicles that have voltage fluctuations due to electrical system design or fault. A constant current driver is a device that takes any incoming voltage and smooths it out, regulates it, so a steady stream of voltage/current reaches the LED. This helps the LED bulb last longer than bulbs that don't have this device built in.