This is the new Optia LED microscope ring light attachment.  It's designed for use with your standard Meiji microscope bench system or the Meiji binocular microscope bench system.  You can tell that it's very simple to install in the microscope.  Ii like that it provides a nice natural spectrum light.  You'll notice that just above the on/off switch is a brightness adjustment knob, so it's very easy to get the exact intensity of light that you want.  You can find the Optia LED microscope ring light attachment on Stuller.com.