A spell is only as strong as the will of it's caster. Basically the light of magick will shine brighter based on the time and effort sacrificed by the caster. If you make a circle out of red chalk, use black store-bought candles, and other ingredients found around the house, you're not going to get the same result as the one using cherrywood, sulfur, real snake-skin candles, and hard-to-find items such as hair, blood, teeth, or bone fragments.