Question: Solve both A certain space needs to be illuminated for 20 hours a day with a total of 18,000 Im. Two types of lamp, detailed

Solve both A certain space needs to be illuminated for 20 hours Solve both

A certain space needs to be illuminated for 20 hours a day with a total of 18,000 Im. Two types of lamp, detailed below, are considered in the design using a costing period of two years. For the two possible lamp systems: (a)Calculate the initial costs and running costs. (b)Compare the total costs of the two systems over 2 years. Given data: Lamp A Lamp B Lamp type Tubular fluorescent LED tubular system Lamp wattage: 60 W 40 W Lamp efficacy: 60 lm/W 90 lm/W Lamp life: 8000 hours 50,000 hours Installation costs: 10 each lamp 12 each lamp (luminaire and gear) Lamp costs: (parts 4 each 15 each and labour) Electricity costs: 20 pence = 0.20 per kWh (same each lamp)

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