Even though there's no visual indication that it is the driver that's failing, replacing an LED driver can save you the hassle and cost of unnecessarily replacing perfectly good LED bulbs. When an LED fixture or LED tube fails prematurely, it is often the fault of the driver. You may also need to purchase a replacement LED driver when it looks like an LED fails before its rated lifetime. Usually your LED will already come included with a driver as part of the assembly, or the spec sheet will specify what type of driver you need to purchase. Check the specifications sheet for your lights or fixture to see if it requires an external driver. LEDs that typically require an external driver include tape light, cove lighting, LED panels and troffers, as well as some landscape lighting. Some LED light bulbs, like those designed to replace household bulbs, already contain an internal driver and don't require an external one.
Because of this, LEDs need drivers to convert that alternating current to direct current and to keep the voltage flowing through an LED circuit at the rated level that the LED requires. Unlike most bulbs that operate on a higher voltage alternating current, LEDs run on low voltage direct current. LED drivers, or LED power supplies, provide LED light bulbs with the electricity they require to function and perform at their best, much like a ballast does for a fluorescent lamp and a transformer does for low-voltage bulbs.
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