Fluorescent and LED ring lights offer shadow-free cold illumination with super-long-life bulbs at a reduced cost. Long thumb screws allow for easy attachment to almost any brand of microscope. The newly-redesigned fluorescent ring light is the most affordable option, and the LED models produce the most intense, focused illumination with 10,000-hour white LED bulbs. The economical 48-bulb LED ring light features variable intensity control, and the new 60-bulb LED ring light is variable and programmable for segmented quadrants to cast shadows when necessary.