E27 40W incandescent bulb is an electric light which produces light with a filament wire heated to a high temperature by an electric current passing through it, until it glows. The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated. In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. This bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.
Generally, incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts. This voltage of this bulb is about 220V. It is said that if the voltage of a product is 12V to 24V, a professional LED voltage converter is needed for operation. It is quite clear that the voltage of this E27 40W incandescent bulb is not in that range, and there is no need of professional LED voltage converter. It is obvious that this bulb is easy and convenient for practical use.
Besides, this bulb needs no external regulating equipment, having low manufacturing costs, and working equally well on either alternating current or direct current. As a result, this incandescent bulb can be widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, and for decorative and advertising lighting.
Until now, you can have a general knowledge of the main characteristics of this high quality E27 40W incandescent bulb. It is easy to conclude that this bulb is functional, practical and convenient for use. As the main characteristics of the bulb are amazing and appealing, this bulb can be used widely and broadly.