The cap is attached to the bulb and provides an electrical contact that diverts the electricity from the bulb. The cap acts as a bridge between the bulbs and the power supply when connected to a lamp. It also helps to attach your light bulbs to their mounting and acts as a "bridge" between them. To help you identify the cap you need for your bulbs, don't forget to read our guide to choosing the right LED Light bulb Raw Material . Here is a look at the different types of LED light bulbs (also known as "E14") that are used in modern lighting. Philips e14 LED lamps have a screw cap that fits the lamp, also known as E14 or E27. This e 14 bulb (also known by its brand name Loom LED Light B22 Cap ) is equipped with a smaller version of the Edison screw. Philips e14LED lamp has the same E14 cap on the base, also known as a small Edison screw, as well as an E26 screw on the base. The LED cartridge is exactly the same as the halogen cartridge, so if you replace your ...