Illumination Engineering Online

  The following questions are all related to ‘Luminaire’. (8 Marks) (a) What does the ‘Ingress Protection Rating’ tell you. (b) Describe the ‘Light Output Ratio (LOR)’, do you want it to be high or low (c) What does an ‘IK code’ specify. Give an example when you will want a high 1K rating. (d) New graduate Lighting Designers are often preoccupied with luminaire at the floor level and forget to light the walls. Why is important to light the walls and ceilings. Design Inputs Space 60m x 60m Ceiling Height 5m Required Illuminance = 320 Lux Floor Reflectance = 20% Ceiling Reflectance = 70% Walls are 60% Painted Gib and 40% Glass Glass Reflectance = 12% Painted Gib Reflectance = 80% The task height is 1m AUT uses an annual cleaning cycle for all rooms including luminaires and faulty lamps are replaced immediately Luminaire Inputs Lumen's = 500Lm per lamp Lifetime = 15,000hrs Lamp Type = Fluorescent Tropospheric (original) Lamps = 2 Luminance Type = Recessed Enclosed IP5X SHR (Cross and Length) 1.6 (b) Calculate the number of luminaires required to achieve the target illuminance level in a normal environment? (Show all workings). Section B - Calculate A new design/study space is being designed in A building , you are asked to complete the lighting design requirements. Using the inputs provided below and the tables provided, answer both questions. (12 Marks (b) Calculate the number of luminaires required to achieve the target illuminance level in a normal environment? (Show all workings). Section B - Calculate A new design/study space is being designed in A building , you are asked to complete the lighting design requirements. Using the inputs provided below and the tables provided, answer both questions.