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  2. Daylight harvesting - Wikipedia

    en.wikipedia.org/wiki/Daylight_harvesting

    Daylight harvesting systems are typically designed to maintain a minimum recommended light level. [1] This light level will vary according to the needs and use of the space; for example, the commonly recommended light level for offices is 500 Lux (or around 50 foot-candles) on the desktop.

  3. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    Ballast-swap replacement for 3 ft T12 30 W T8: 1.0, 25: 4: 32 F32T8: Ballast-swap replacement for 4 ft T12 40 W T8: 1.0, 25: 8: 59 F96T8: Ballast-swap replacement for 8 ft T12 75 W single-pin T12: 1.5, 38: 4 "25" F40UTSL Retrofit replacement for 4 ft T12 40 W on underpowered residential-grade rapid start magnetic ballasts. These are F40CW lamps ...

  4. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    [1] [3] To prevent this, fluorescent tubes are connected to the power line through a ballast. The ballast adds positive impedance (AC resistance) to the circuit to counteract the negative resistance of the tube, limiting the current. [1] Several American magnetic ballasts for fluorescent lamps. The top is a rapid start series autoregulator ...

  5. Daylighting (architecture) - Wikipedia

    en.wikipedia.org/wiki/Daylighting_(architecture)

    At night, ORNL HSL uses variable-intensity fluorescent lighting electronic control ballasts. As the sunlight gradually decreases at sunset, the fluorescent fixture is gradually turned up to give a near-constant level of interior lighting from daylight until after it becomes dark outside. HSL may soon become an option for commercial interior ...

  6. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    This may include high efficiency fixtures and automated controls that make adjustments based on conditions such as occupancy or daylight availability. Lighting is the deliberate application of light to achieve some aesthetic or practical effect (e.g. illumination of a security breach). It includes task lighting, accent lighting, and general ...

  7. Are banks, post offices, UPS and FedEx open on Christmas 2024 ...

    www.aol.com/banks-post-offices-ups-fedex...

    Christmas is two weeks away and if you are looking to send a package or conduct a banking transaction, it may be best to plan ahead.. While some restaurant, grocery store and retail chains will be ...