Light, temperature, and humidity levels are important to a plants health. This first-ever 3-in-1 meter helps to take the guess work out of understanding your interior environment so you can better manage plant care in the home.   Provides accurate readings for natural light and white LED grow lights  Effectively measures the relative humidity and temperature in a room  Uses 3 AAA batteries (not included)  Good for indoor or outdoor use Compact fits in your pocket