Apart from humorous answers, that without light we can’t see what we are typing or doing, I must pay your attention to the fact that light is one of the most important necessities. Life is not impossible without light. I mean it. Even before the invention of the first light bulbs people were aware how crucial the light is. They were using fire and candles in order to get it during night times.
Let me remind you that light is necessary for plants in order to perform the process of photosynthesis. It is the only way for plants to gain their energy. Without plants animals and people can stay without a valuable and nutritive source of food and vitamins. Sunlight is especially important for human skin. Only light can give the Earth enough warmth in order for us to live.
Light is the main source of energy. Nowadays we have numerous light fixtures and even solar light systems which are used in our houses. Usual yellowish light of traditional bulbs is not very pleasant that is why researchers have metal halide, such light has its own advantages and disadvantages and you are welcome to find more about them:
Advantages:
- such light is much cheaper than regular lighting while providing the same brightness;.
- it lasts longer because such light has a lifespan six times longer than a regular bulb;
Disadvantages:
- the initial cost of such lamps can be a bit higher;
- sometimes installation can be rather complex and long;
- when not properly installed such lamps can produce an uneven light that may bother people;
- such lighting is not very attractive form the decorative point of view.
Just bear in mind, light is important and you have to choose the best )))
