Abstract: Disclosed are a method and system for controlling a display condition which is pre-written into a passive light board by a mobile device. A display status is pre-written into a passive light board which is not powered by electricity before, and a control application program loaded into the mobile device is provided for a user to input a brightness parameter and a color temperature parameter. The light board which is not powered by electricity before can carry out the presetting of the display condition, and related manufacturers can set the light boards quickly and easily after the light boards exit the factory, and the light boards can display according to the conditions in compliance with the brightness parameter and the color temperature parameter after the light boards are powered on.

Abstract: A strip lighting system comprising a string of electrically connected light bulbs contained within a flexible tube. The tube is of waterproof material and is sealed at each end by a removable plug, so that the string of bulbs can be removed when necessary to be repaired or replaced.

Abstract: The invention relates to lubricants for use in metal shaping operations, especially hot and cold rolling of steel and aluminium, and casting of aluminium. Preferred lubricants comprise in a mixture (i) a tetraester of pentaerythritol and a C.sub.16 to C.sub.20 aliphatic monocarboxylic acid, (ii) orthophosphoric acid. The lubricants have markedly reduced coefficients of friction; improved roll-wear characteristics and good stability at temperatures of 250+.degree.C. Incorporation of mineral oil and an emulsifier enables the thus modified composition to be used for the preparation of aqueous emulsions or dispersions.