North American Scientific Inc, Chatsworth, Calif, offers the Featherlite? floods, which weigh up to 50% less than floods of comparable size. Though lighter, Featherlite is durable. The method used to build the active element makes it virtually unbreakable. The activity is accurate; its homogeneous distribution has a standard deviation of less than 1%. Featherlite is available in all sizes. (800) 992-6274; .