Lighting is a most important factor in architectural design. People have no ability to see architectural product or defining form and space without light. Lighting has ability to influence visual condition, with lighting intensity, lighting color, and light pattern in architecture, interior, or exterior.

In daytime, sunlight play important role to make a visual condition and give visual information about our surrounding. At night, artificial lighting have important role to make a good visual condition with light quality and quantity. To accomplishing lighting quantity, we need to know about lighting intensity standard for each room. Lumen method is one of part method that can use to calculate lighting quantity.

Whereas, lighting quality is one condition that lighting to be able to accomplishing human need. To make good visual condition, some approach is needed, like lighting design factors (intensity, color and pattern) and human visual perception. Perceptions of lighted settings are the result of the brain’s interpretation of physiological reactions to those lighted settings.

Visual perception can be used as a methodology to found some influences factor in architectural lighting design. To measure human perception for lighting quality, we can use semantic differential method, with some adjectives and its antonym (e.g. bright – dark, cheerful – dull, beautiful – ugly). (the infinity space)