What is the Kelvin rating on a bulb mean?
A. Kelvin is the unit of measurement expressing color temperature. Each lamp has an aggregate Kelvin temperature that indicates the bulbs spectral output. For indoor gardening a bulb with a Kelvin rating between 3000-6000 will be sufficient Back To Top • Q. Can I use a green light in my grow room in the dark cycle? I’ve heard that green light won’t wake up my plants? A. Yes you can use a green light in your grow room. Plants do not respond to the green range of the spectrum. Back To Top • Q. What is a more efficient reflector to use if my lamp is universal, horizontal or vertical? A. Definitely horizontal. Horizontal reflectors can reflect up to 40 % more light back down to the growing area. The light form a bulb is emitted form the arc tube located in the center of the lamp. If it is burning in the horizontal position, half of this light is being directed at the plants while the other half is being reflected back down form the reflector giving a complete distribution of the light. If
