Home And Garden

TYPES OF LIGHTS Introduction There are a number of different approaches used for growing plants under lights. To make an informed decision as to what type of lighting should be employed, the fundamentals of light, colour and lighting systems should be understood. In this article we will examine the how light is qualitatively appraised with respect to color and intensity. Different lighting systems will be examined, and most available types of lights will be discussed. Examples of some "real world" lighting systems will be given and analyzed with respect to effectiveness, initial cost, operating expense and longevity. LIGHT AND COLOUR What is light Visible light is that part of the electro-magnetic spectrum that lies between the wavelengths of ultraviolet and infrared. That's probably more that you need to know for the purposes of home growing. White light is all colors When we see a rainbow, we are seeing white light split up into it's component colours, hence the

Retaining walls make beautiful additions to gardens, patios and overall landscaping. It's a decorative-- and very popular-- way to organize a yard. It's also one of those projects almost any homeowner can do. It just takes some planning and patience. Read on to learn how to build a landscaping retaining wall. Instructions 1 Use a measuring tape to come up with dimensions and determine where you will build the retaining wall. 2 Determine the linear feet of the project, so you know how many concrete blocks to purchase. 3 Make sure the area where the retaining wall will be built is clearly marked. Using spray paint will help. 4 Use a shovel to dig a trench. Make sure the trench is wide enough to fit a block plus a couple inches for rock. It needs to be deep enough to partially bury the first row of concrete blocks. Usually this will be 8 to 12 inches below ground level. 5 Add at least one inch of crushed rock to the trench. This will help make the base fir