The PHILIPS PL-C 13W/835/4P ALTO Light Bulb is a high-quality light bulb designed for use in various lighting fixtures. With a bulb wattage of 13W and a distinctive bulb shape code of PL, this Philips light bulb offers bright and efficient illumination. The 4P ALTO model ensures a specific design that is compatible with specific lighting fixtures, providing a reliable and consistent lighting solution for home or office use.