Can I dim an LED light bulb with a standard dimmer?

Each LED bulb has its own characteristics. You should read the information on the package. There are many websites where dimmer manufacturers like Lutron Electronics lists all the light bulbs they have tested and what dimmers they will work with. Also, many light bulb manufacturers list the type of dimmers that will work with their bulbs or strips. If the LED light bulb strobes as it dims downward that is a good indicator that the bulb and the dimmer are not compatible.