What is the nomenclature of the lightbulbs?

The screws are usually classified with letters or numbers, depending on the features or the number of contacts they need. Here you have an example of the nomenclature of a lightbulb screw.

B - Swan or Bayonet Screw.

The bayonet light bulb mount is the standard fitting in many former members of the British Empire including the United Kingdom, Australia, India, Ireland, and New Zealand, Hong Kong, as well as parts of the Middle East and Africa

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E - Edison screws.

They are thread and Edison screws. Named in honour of Thomas Alva Edison, inventor of the lightbulb. E27 bulbs, often referred to a ES bulbs which is an acronym for Edison-screw,have a threaded base for use with compatible screw in fixtures. The base of an E27 light bulb is 27mm wide and is a popular fitting in a range of domestic settings for lamps and feature lights.

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GU Screw

These bulb sockets with rear heat emission protection are connected by means of two terminals. GU: general use. The GU10 is a socket with two symmetrical sockets with a diameter of 5 mm and a pitch of 10 mm. Most GU10 bulbs, both halogen and LED, operate at 220V. They are mainly used in recessed spotlights and ceiling lights.

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LED Lights Emit Negligible Heat:
One of the most environmental friendly aspect of LED lighting is that these lights have very high electricity to light conversion efficiency, as high as 90% in most cases. This high conversion efficiency implies that there is minimal heat loss in the environment.

LED Lights Have Long Life:
LED lights have a rated life of 30,000 to 50,000 hours which is many folds greater than the conventional counterparts. This longer life span reduces the need of bulb replacement after every few months, thereby reducing the need to dispose-off the old ones into the landfills.

LED Lights Do Not Accumulate Harmful Chemicals In The Environment:
Unlike the compact fluorescent lights which have 4 to 5 milligrams of mercury present in each of them, LED lights are free of any chemical which can be hazardous for environment or public health.

LED Lights Have Smaller Carbon Footprint:
Greenhouse gas emissions associated with the LED lights are relatively far less than the conventional incandescent or Compact fluorescent lights. According to carful calculations, one LED bulbs, providing the same luminosity as one incandescent bulb emits 80% less greenhouse gases. The same calculation for CFLs suggest a reduction of 50% GHGs by switching to LED lights.

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