Softball rules vary somewhat from those of baseball. Two major differences are that the ball must be pitched underhandâfrom 46 ft. (14 m) for men or 43 ft(13.1 m) for women as compared with 60.5 ft. (18.4 m) in baseballâand that seven innings instead of nine constitute a regulation game.
Many ENERGY STAR certified bulbs come in warm colors to match the yellowish light of incandescent bulbs, but you can also choose cooler colors with whiter or bluer light. Choosing the Right Color: Light color is measured on a temperature scale referred to as Kelvin (K). Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer. Most ENERGY STAR certified bulbs are made to match the color of incandescent bulbs at 2200-3000K. For a whiter light, look for bulbs marked 3500-4100K. For bluer white light, look for bulbs marked 5000-6500K.
The kelvin (abbreviation K), less commonly called the degree Kelvin (symbol, o K), is the Standard International (SI) unit of thermodynamic temperature. One kelvin is formally defined as 1/273.16 (3.6609 x 10 -3) of the thermodynamic temperature of the triple point of pure water (H 2 O). The kelvin scale differs from the more familiar Celsius or centigrade (o C) temperature scale; there is no such thing as a below-zero Kelvin figure. A temperature of 0 K represents absolute zero, the absence of all heat. However, the size of the kelvin degree is the same as the size of the Celsius degree..