We are a professional flashlight manufacturer, We have many years of flashlight production experience, All the products we produced have been rigorously tested, Make sure it's high quality and it works really well. Yes, Green beam can be used on screens, such as Led Lcd screens. Yes, you can see a bright beam in the dark We are professional flashlight manufacturer, We have many years of flashlight production experience, All the products we produced have been rigorously tested, Make sure it's high quality and it works really well.