“PL” stands for plug-in lamp, which mounts either vertically or horizontally. LED PL bulbs from NovaLux are generally used in commercial buildings and they are able to be mounted both vertically and horizontally. They can be used as downlights, porch sconces, and decorative lighting in hotels, schools, hospitals, warehouses, garages, and more.
A NovaLux T10 LED bulb is a tubular bulb with a diameter of 10/8 or 1.25 inches. T10 bulbs typically find use in enclosures such as signage or showcases.