The general rule of thumb for the height of a wall light, is to have the top of the shade around eyelevel. This way you avoid glare from the bulb, so generally speaking around 5 -5.5ft above ground level is ideal. However, this is purely a guideline as ceiling height can vary, it is best to adjust this accordingly. When using wall lights as task lighting, the best positioning for these lights would be whichever height gives the most focus on the area. For example, picture lights will always be placed just above the painting or picture you wish to draw attention to. If you are using wall lights in your bathroom, placing one either side of your bathroom mirror will give a flattering, even and glare-free light. When using multiple wall lights for an area these are best placed around 8-10ft apart, again this is a general rule of thumb and will largely depend on the size of the area you are using them in. If you’re using wall lights as accent lighting to highlight a particular area or simply your favourite display item on a shelf or cabinet, placing this lighting significantly lower than eye level will not only help illuminate the item but will also help draw more attention to the desired area.