Learn English – one word for collection of light beams

If the light is too bright, you might use terms dazzling or glaring. If instead you refer to cost of running several bulbs, say extravagant or wasteful.

The size-weight illusion can explain the sensation you are describing:

• The size–weight illusion, also known as the Charpentier illusion, is named after the French physician Augustin Charpentier because he was the first to demonstrate the illusion experimentally.

• These illusions can all be described as contrast with the expected weight. The expected weight or density can be measured by matching visible and hidden weights, lifted in the same manner.

• An early explanation of these illusions was that people judge the weight of an object from its appearance and then lift it with a pre-determined force. They expect a larger object to be heavier and therefore lift it with greater force: the larger object is then lifted more easily than the smaller one, causing it to be perceived as lighter.

Source: wwww.en.m.wikipedia.org