Brightness of lamps:lumen-watt is a free utility tool developed by ST Progs for Android users. The program is designed to help users calculate the equivalent wattage of new lamps in lumens to old-style incandescent lamps. With this program, users can easily calculate the brightness of new lamps and know the equivalent wattage of the old-style incandescent lamps.

The program is user-friendly and easy to use, making it suitable for anyone. It's a great tool for those who are looking to switch to energy-saving lamps and want to know the equivalent wattage of their old-style incandescent lamps. In conclusion, Brightness of lamps:lumen-watt is a useful tool that provides accurate calculations for users to make informed decisions when purchasing new lamps.