Podcast
Questions and Answers
What is responsible for regulating the current flow through the fluorescent lamp?
What is responsible for regulating the current flow through the fluorescent lamp?
Why do larger tubes require a substantial voltage to start the arc?
Why do larger tubes require a substantial voltage to start the arc?
What is used in preheat lamps to preheat the filaments before striking the arc?
What is used in preheat lamps to preheat the filaments before striking the arc?
Which component is used for power factor correction in fluorescent lamps?
Which component is used for power factor correction in fluorescent lamps?
Signup and view all the answers
What is responsible for altering mains voltage frequency into high-frequency AC for fluorescent lamps?
What is responsible for altering mains voltage frequency into high-frequency AC for fluorescent lamps?
Signup and view all the answers
What material is used for the envelope of germicidal lamps that produce unfiltered ultraviolet glow?
What material is used for the envelope of germicidal lamps that produce unfiltered ultraviolet glow?
Signup and view all the answers
Why are fluorescent lamps equipped with a capacitor?
Why are fluorescent lamps equipped with a capacitor?
Signup and view all the answers
Which term describes lamps that use a filament/cathode at each end in conjunction with a preheating mechanism?
Which term describes lamps that use a filament/cathode at each end in conjunction with a preheating mechanism?
Signup and view all the answers
How does an incandescent light bulb produce light?
How does an incandescent light bulb produce light?
Signup and view all the answers
What function does the enclosing glass bulb serve in an incandescent light bulb?
What function does the enclosing glass bulb serve in an incandescent light bulb?
Signup and view all the answers
What is another term used to refer to incandescent bulbs?
What is another term used to refer to incandescent bulbs?
Signup and view all the answers
Which type of current can incandescent lamps work well on?
Which type of current can incandescent lamps work well on?
Signup and view all the answers
What is the primary reason for the wide use of incandescent lamps in household and commercial lighting?
What is the primary reason for the wide use of incandescent lamps in household and commercial lighting?
Signup and view all the answers
Which inventor was issued U.S. Patent #223898 for the Electric Lamp in 1880?
Which inventor was issued U.S. Patent #223898 for the Electric Lamp in 1880?
Signup and view all the answers
What does the notation FC##T# for circular bulbs represent?
What does the notation FC##T# for circular bulbs represent?
Signup and view all the answers
What type of power sources are compact fluorescent lamps (CFLs) produced for?
What type of power sources are compact fluorescent lamps (CFLs) produced for?
Signup and view all the answers
Which color is usually indicated by the abbreviation EW for fluorescent lamps?
Which color is usually indicated by the abbreviation EW for fluorescent lamps?
Signup and view all the answers
Where are DC CFLs popular for use?
Where are DC CFLs popular for use?
Signup and view all the answers
What type of lamps are typically labeled BLB and used in bug zappers?
What type of lamps are typically labeled BLB and used in bug zappers?
Signup and view all the answers
What do some families in developing countries use to power DC CFLs instead of kerosene lanterns?
What do some families in developing countries use to power DC CFLs instead of kerosene lanterns?
Signup and view all the answers
Which historical figure invented the predecessor to the modern compact fluorescent lamp (CFL)?
Which historical figure invented the predecessor to the modern compact fluorescent lamp (CFL)?
Signup and view all the answers
What is the average rated lifespan of a CFL compared to incandescent lamps?
What is the average rated lifespan of a CFL compared to incandescent lamps?
Signup and view all the answers
What is the most common color represented by the abbreviation CW for fluorescent lamps?
What is the most common color represented by the abbreviation CW for fluorescent lamps?
Signup and view all the answers
What distinguishes a compact fluorescent lamp (CFL) from an incandescent lamp?
What distinguishes a compact fluorescent lamp (CFL) from an incandescent lamp?
Signup and view all the answers
How many hours is the rated lifespan of typical CFLs within?
How many hours is the rated lifespan of typical CFLs within?
Signup and view all the answers
Which type of lamp is denoted by the abbreviation BL and commonly used in nightclubs?
Which type of lamp is denoted by the abbreviation BL and commonly used in nightclubs?
Signup and view all the answers
What is a measure used to compare the energy efficiency of different types of light bulbs?
What is a measure used to compare the energy efficiency of different types of light bulbs?
Signup and view all the answers
What is the typical efficiency range of a CFL in converting electric power to radiant power?
What is the typical efficiency range of a CFL in converting electric power to radiant power?
Signup and view all the answers
Why is the spiral-type compact fluorescent lamp slightly less efficient compared to tubular fluorescent lamps?
Why is the spiral-type compact fluorescent lamp slightly less efficient compared to tubular fluorescent lamps?
Signup and view all the answers
Why is the output of lamps commonly measured in lumens?
Why is the output of lamps commonly measured in lumens?
Signup and view all the answers
What is the typical luminous efficacy of CFL sources?
What is the typical luminous efficacy of CFL sources?
Signup and view all the answers
In comparison, what is the luminous efficacy range for incandescent lamps?
In comparison, what is the luminous efficacy range for incandescent lamps?
Signup and view all the answers
What is one drawback of CFLs when compared to incandescent bulbs in terms of starting time?
What is one drawback of CFLs when compared to incandescent bulbs in terms of starting time?
Signup and view all the answers
What contributes to the shorter life of CFLs when turned on and off for short periods?
What contributes to the shorter life of CFLs when turned on and off for short periods?
Signup and view all the answers
Which type of lamp uses a radio-frequency oscillator to excite mercury vapor?
Which type of lamp uses a radio-frequency oscillator to excite mercury vapor?
Signup and view all the answers
What distinguishes Cold Cathode Fluorescent Lamps (CCFLs) from traditional CFLs?
What distinguishes Cold Cathode Fluorescent Lamps (CCFLs) from traditional CFLs?
Signup and view all the answers
What is one of the environmental benefits of using compact fluorescent lamps (CFLs)?
What is one of the environmental benefits of using compact fluorescent lamps (CFLs)?
Signup and view all the answers
Why is the size of compact fluorescent lamps (CFLs) sometimes an issue?
Why is the size of compact fluorescent lamps (CFLs) sometimes an issue?
Signup and view all the answers
What might accompany the failure of the electronic ballast in a CFL?
What might accompany the failure of the electronic ballast in a CFL?
Signup and view all the answers
How do CFLs offset the higher energy consumption during their manufacturing phase?
How do CFLs offset the higher energy consumption during their manufacturing phase?
Signup and view all the answers
What is a primary objective of compact fluorescent lamp (CFL) design?
What is a primary objective of compact fluorescent lamp (CFL) design?
Signup and view all the answers
How do CFLs help reduce greenhouse gas emissions?
How do CFLs help reduce greenhouse gas emissions?
Signup and view all the answers
Why might high output CFLs be larger than their incandescent equivalents?
Why might high output CFLs be larger than their incandescent equivalents?
Signup and view all the answers
What issue might be experienced when the electronic ballast in a CFL fails?
What issue might be experienced when the electronic ballast in a CFL fails?
Signup and view all the answers
Who invented the modern CFL in response to the 1973 oil crisis?
Who invented the modern CFL in response to the 1973 oil crisis?
Signup and view all the answers
Which company did George Inman team with to create a practical fluorescent lamp?
Which company did George Inman team with to create a practical fluorescent lamp?
Signup and view all the answers
What is the most important technical advance in CFLs mentioned in the text?
What is the most important technical advance in CFLs mentioned in the text?
Signup and view all the answers
Who patented a high pressure vapor lamp in 1927?
Who patented a high pressure vapor lamp in 1927?
Signup and view all the answers
What part of a CFL emits ultraviolet light when an electrical current flows through it?
What part of a CFL emits ultraviolet light when an electrical current flows through it?
Signup and view all the answers
Which type of lamps have two main parts: gas-filled tube and ballast?
Which type of lamps have two main parts: gas-filled tube and ballast?
Signup and view all the answers
What was the fate of General Electric's invention of the modern CFL due to cost reasons?
What was the fate of General Electric's invention of the modern CFL due to cost reasons?
Signup and view all the answers
What does the phosphor coating do inside a gas-filled tube of a CFL?
What does the phosphor coating do inside a gas-filled tube of a CFL?
Signup and view all the answers
How does a fluorescent lamp convert electrical energy into radiant energy?
How does a fluorescent lamp convert electrical energy into radiant energy?
Signup and view all the answers
What was Heinrich Geissler's contribution to the development of the fluorescent lamp?
What was Heinrich Geissler's contribution to the development of the fluorescent lamp?
Signup and view all the answers
What is the fundamental process for converting electrical energy into radiant energy in a fluorescent lamp?
What is the fundamental process for converting electrical energy into radiant energy in a fluorescent lamp?
Signup and view all the answers
What early observation led to advancements in the development of the fluorescent lamp?
What early observation led to advancements in the development of the fluorescent lamp?
Signup and view all the answers
What effect does the instability of a higher energy state have on an atom in a fluorescent lamp?
What effect does the instability of a higher energy state have on an atom in a fluorescent lamp?
Signup and view all the answers
What facilitated the observation of a strong green glow in Geissler tubes when an electrical current passed through?
What facilitated the observation of a strong green glow in Geissler tubes when an electrical current passed through?
Signup and view all the answers
In which part of the fluorescent lamp is the radiant green glow observed?
In which part of the fluorescent lamp is the radiant green glow observed?
Signup and view all the answers
What is essential for incident free electrons to transfer energy to an atom's outer electron in a fluorescent lamp?
What is essential for incident free electrons to transfer energy to an atom's outer electron in a fluorescent lamp?
Signup and view all the answers
What type of lamps have a reflective coating inside the bulb to direct light forward?
What type of lamps have a reflective coating inside the bulb to direct light forward?
Signup and view all the answers
Which type of bulb puts approximately double the amount of light on the front central area as General Service bulbs of the same wattage?
Which type of bulb puts approximately double the amount of light on the front central area as General Service bulbs of the same wattage?
Signup and view all the answers
In what type of lighting fixtures are Parabolic Aluminized Reflector (PAR) bulbs commonly used?
In what type of lighting fixtures are Parabolic Aluminized Reflector (PAR) bulbs commonly used?
Signup and view all the answers
What is indicated by the number in a PAR bulb's name, such as PAR 30 or PAR 38?
What is indicated by the number in a PAR bulb's name, such as PAR 30 or PAR 38?
Signup and view all the answers
What contributes to the increase in voltage across the lamp for easy starting in fluorescent lamps?
What contributes to the increase in voltage across the lamp for easy starting in fluorescent lamps?
Signup and view all the answers
Compared to incandescent lamps, what is a major advantage of fluorescent lamps in terms of luminous efficacy?
Compared to incandescent lamps, what is a major advantage of fluorescent lamps in terms of luminous efficacy?
Signup and view all the answers
What is a potential health and safety issue associated with fluorescent lamps if they break?
What is a potential health and safety issue associated with fluorescent lamps if they break?
Signup and view all the answers
Why is the ballast required in fluorescent lamps?
Why is the ballast required in fluorescent lamps?
Signup and view all the answers
What characterizes the luminosity of a fluorescent tube compared to an incandescent lamp?
What characterizes the luminosity of a fluorescent tube compared to an incandescent lamp?
Signup and view all the answers
When operated for several hours, approximately how much longer can a fluorescent lamp last compared to an equivalent incandescent lamp?
When operated for several hours, approximately how much longer can a fluorescent lamp last compared to an equivalent incandescent lamp?
Signup and view all the answers
In terms of heat emission, how does the heat produced by fluorescent lamps compare to an equivalent installation of incandescent lamps?
In terms of heat emission, how does the heat produced by fluorescent lamps compare to an equivalent installation of incandescent lamps?
Signup and view all the answers
What is the primary function of the inductor in conjunction with the capacitor in a fluorescent lamp?
What is the primary function of the inductor in conjunction with the capacitor in a fluorescent lamp?
Signup and view all the answers
