Choose non-reflective glass to cover your artwork, or plan to place the lighting at a 30-degree angle to the painting.
Pick a broad-based light source; these are best for oil paintings.
Use a halogen light, which produces the purest white light, necessary for showcasing a painting properly.
Place the light far enough away from the painting so as to not damage the painting with the light's heat. Halogen lights produce large amounts of heat.
Put your hand over the painting to test whether the light is too close. If your hand can feel heat from the light, it is too close.
Light the painting three times brighter than the room it is in. This is a general rule of thumb for lighting any piece of art.