In an occupied space, I have a 100 fluorescent luminaires. All luminaires are 277V single-phase 2’ x 2’ 2-bulb units, wi
Posted: Thu May 05, 2022 2:45 pm
In an occupied space, I have a 100 fluorescent luminaires. All luminaires are 277V single-phase 2’ x 2’ 2-bulb units, with a ballast dedicated to each bulb. The ballast and bulb combination use a combined 30 watts (25 for the lamp and 5 wasted as heat by the ballast) of power during operation.
a. In my space, 20% of my lights are designated as exit lighting. An exit luminaire keeps both bulbs on 100% of the time to provide a minimum level of illumination to move around the building. How much power am I using a year to keep these luminaires on?
b. A further 10% (apart from the exit lighting) of the total luminaires are used as egress lighting. These luminaires have a separate battery pack attached to a single ballast and bulb combination which provides illumination in the event of a total power outage. How much power do the battery packs need to provide during a power outage. If the lights must be kept on for 90 minutes after a power outage, how much energy to the battery packs need to supply during this period?
c. I want to install these same fixtures above a public, indoor swimming pool. What special considerations do I need to keep in mind to install these luminaires in this location? Cite your reasons.
a. In my space, 20% of my lights are designated as exit lighting. An exit luminaire keeps both bulbs on 100% of the time to provide a minimum level of illumination to move around the building. How much power am I using a year to keep these luminaires on?
b. A further 10% (apart from the exit lighting) of the total luminaires are used as egress lighting. These luminaires have a separate battery pack attached to a single ballast and bulb combination which provides illumination in the event of a total power outage. How much power do the battery packs need to provide during a power outage. If the lights must be kept on for 90 minutes after a power outage, how much energy to the battery packs need to supply during this period?
c. I want to install these same fixtures above a public, indoor swimming pool. What special considerations do I need to keep in mind to install these luminaires in this location? Cite your reasons.