18 inch under cabinet lighting

Yes — 18" is a common size. Manufacturers typically offer under-cabinet LED bars in multiple lengths such as 12", 18", and 24".

Typical installation options include hardwired (direct wire) or plug-in setups. Many models also support linking multiple fixtures together for a continuous run.

Brightness varies by model, but many 18" LED under-cabinet fixtures list lumen outputs in the roughly 500–1,150 lumen range.

Common fixed color temperatures include warm white around 3000K. Many fixtures offer selectable/tunable white options (for example 3000K/3500K/4000K), and some smart models add full color-changing capability.

Power is usually supplied via a plug-in cord or hardwired connection. Many bars offer linking so multiple fixtures can be connected; some products list optional plug-in/link accessories or specify limits (for example, the ability to link up to ten fixtures).

Manufacturers commonly use plastic or acrylic diffusers and housings, steel components for brackets or hardware, and aluminum for more durable or heat-dissipating housings.

LED lifespans are commonly listed from about 25,000 up to 50,000 hours, with several fixtures specifically rated around 50,000 hours.

Look for industry markings such as ETL, cUL, or ENERGY STAR on some models, and check color-rendering specs — many fixtures advertise a high CRI (for example, CRI around 90) for accurate color rendering.