Lighting is an incredibly important part of any home or business. It’s not just about being able to see things, but it’s also about creating the right mood and ambiance. A lot of people do not realize that lighting can play a huge part in your energy bill, so when you are planning on buying new lights make sure to do some research and know how much they will cost you each month before making a purchase!

Definition of lighting

Lighting is a major part of interior design and can be used to create moods, set a tone, and create safety and security. Lighting can also be used to create a sense of space by ensuring that areas are bright enough for people to move around safely.

It is a vital part of any home or building. When you’re looking to install new lights, it’s important to know how they’re calculated so you can make an informed decision on what type of lighting will best suit your needs.


The history of lighting dates back to ancient times. In fact, people have been using light to guide their way through dark places for thousands of years. The earliest known use of fire as a source of light occurred when humans first started keeping livestock like cows, sheep, and goats. These animals provided humans with milk and meat—but they also supplied them with dung (animal poop). Burning this waste took care of both problems at once!

Fire pits were used to cook food and keep the insects away from people’s faces at night—but it wasn’t until prehistoric man discovered how to make fire from scratch that we had real torches which could be used for more than just cooking or keeping bugs away during the day time hours (when there was enough sunlight).

Types of lighting

Luminous flux is the total amount of light emitted from a light source. This is different from simply measuring the visible light output, since some portion of visible light may be reflected or scattered and not emitted by the source.

Luminous efficacy, also known as luminous efficiency or lumens per watt, is a measure of how much useful light (luminous flux) is produced for every unit of electrical energy consumed. A photoluminescent object has several parameters that affect its luminosity; these include its temperature and brightness (radiance).


How many lights do I need in a room?

As a handy rule of thumb, a sitting room or bedroom will generally require around 10-20 lumens per square foot, while a bathroom or kitchen will need a stronger level of lighting, at around 70-80 lumens per square foot.

How many LED lights can you put on one switch?

Most homes allow for 23 to 40 60-watt bulbs or 280 to 480 5-watt LEDs.

How do I choose LED wattage?

If you’re replacing a 100-watt incandescent bulb, you’ll want an LED that produces about 1,600 lumens. A replacement for a 40-watt incandescent bulb should produce about 450 lumens.