Large clock, easy to read during daylight hours. It does not glow in the dark though. There is a small led bulb at the 3-6-9-12 positions which will come on when activated by sound like clapping or loud talking. Depending on eyesight, the bulbs almost seem too bright and can interfere with reading the time at night. It did keep accurate time and temp, I used indoors. Gave 4 stars instead of 5 because the light feature might work better if put behind the faceplate to make it glow as a backlight instead of shining out from the sides.