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.
Examples include: 1  tube- and compact-style fluorescent bulbs, including compact fluorescent lamps (CFLs); 2  mercury vapor bulbs â i.e., high intensity lamps with blue-white, originally used as farmyard lights; 3  metal halide bulbs â i.e., newer, more efficient high intensity lights; and.