In an average February, Rome has four days that dip below 32 degrees F; the average high is 56, and the average is 40. Paris averages 12 days each February below 32 degrees F; the average high is 45 and the average low is 34. Only you know what constitutes weather that is too cold to enjoy.
A fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the bulb to glow.
How Fluorescent Bulbs Are Made. Compact fluorescent bulbs (CFLs) are made using the same basic technology as the traditional fluorescent bulb, which has been in use for nearly a century.They are made from two main parts, which include a simple glass tube and a electric ballast. The inside of the tube is coated with phosphorus.ow Fluorescent Bulbs Are Made. Compact fluorescent bulbs (CFLs) are made using the same basic technology as the traditional fluorescent bulb, which has been in use for nearly a century.