... weigh over 50kgs and cost thousand of dollars. the range of application:It is suitable for PROJECTOR,PROJECTOR,EPIDIASCOPE and ,also suitable ... for Solar energy collector system, start a fire under sunlight, hot water heater, solar furnace, stage light,LCD projector ... luminous flux of the products. CE,Factory Audit,ISO9001,AGC. HOT sell high quality PMMA Standard Fresnel Lens FOR STAGE LIGHT