Better lighting for industries at work on defense contracts is offered by a far more powerful mercury lamp developed by General Electric, The new 3,000-watt Mazda AH9 mercury lamp is rated at 120,000 lumens - eight times more powerful than the nearest rival among its kind. Yet its 55-inch length is only four times that of the 400-watt mercury lamp, heretofore the largest and chief source of light in many factories. It is barely more than an inch in diameter. In trial installations the lamp provided more than 50 footcandles of light at the working level, compared with the average factory illumination of less than 10 footcandles. This abundance of light provides swift and accurate seeing qualities and is expected to prove a vital factor in speeding defense production.