Â· 43 comments. in Facts. An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence. The abbreviation âIQâ comes from the German term Intelligenz-Quotient, originally coined by psychologist William Stern.
Lower explosive limit. Lower explosive limit (LEL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower flammable limit (LFL).
Light Emitting Ceramic (LEC) Definition - What does Light Emitting Ceramic (LEC) mean? Light emitting ceramic (LEC) halide lights are used in indoor gardening applications to provide a wider spectrum of light than is possible with conventional fluorescent bulbs. They also reduce energy costs at the same time.