Where to put your garden. 1  Choose a smart site for your vegetable garden. 2  Container gardening for vegetables and herbs. 3  How to grow a hydroponic garden. 4  Smart fertilizer use: A vegetable garden begins with a soil management plan. 5  Caring for your soil tip sheet.  Prepare the smart vegetable garden.
mass noun. 1  1Light or heat as emitted or reflected by something. âthe radiance of the sunset dwindled and diedâ. 2  2Physics. The flux of radiation emitted per unit solid angle in a given direction by a unit area of a source.
Illuminance (lux): Illuminance is a measurement of the light intensity at any point. The light intensity drops exponentially the further away you get from the source (distance). Luminous Flux (Lm): The luminous flux is a measure of the total light output from a source. For example, a 1 candela light source will product 1 lumen per square meter at the distance of 1 meter. Beam Angle: The beam angle is the angle of radiation for a light source. For example a beam angle on 30 degrees means the light has a shape of a cone and its borders form a 15 degree angle with the center axis. A change in the beam angle affects the luminous intensity (lux) of a light source but not the luminous flux (Lumens).