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difference between measured light and perceived light

FAQ: What is the difference between measured light and perceived light?

In a note titled “Measured light vs. perceived light”, Lutron describes the difference as follows… “The human eye responds to low light levels by enlarging the pupil, allowing more light to enter the eye. This response results in a difference between measured and perceived light levels. A lamp that is dimmed to 10% of its...
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difference between measured light and perceived light

FAQ: Why is colour temperature important in room lighting?

Colour temperature (or correlated colour temperature, CCT) is a number indicating the degree of yellowness or blueness of a white light source. Measured in kelvins (K), CCT represents the temperature an incandescent object (like a filament) must reach to mimic the colour of the lamp. Yellowish-white (warm) sources, like incandescent lamps, have lower colour temperatures...
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FAQ: Why is the life span of an LED measured as lumen depreciation?

One of the most attractive features of LED lights is the fact that their lifespan is much longer than of incandescent, fluorescent or HID lamp sources and that they are much less prone to failure. This leads to amazing energy savings over the long life of their use. However, even high quality LED lights will...
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About our Blog

The Actis Integration and AV Blog is a forum for sharing tips, insights, news, solutions and experiences with people and businesses who are undertaking different types of integration projects in India. It covers topics like Professional AV, lighting, energy management, video collaboration, unified communications, presentations, network AV and environment control.

Over time it will grow into a practical, India-specific, knowledge base to assist CIOs/CTOs, architects, AV and lighting consultants, developers, educational institutions and the hospitality industry to make better choices and get more out of their investments in technology.

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