Pastels, color pencils, graphite, oil paint, and acrylics — it doesn't matter what medium you choose to draw with. What you are essentially doing whenever you draw or paint is capturing light. Everything that you see is because of light, no matter how little or how abrasive the amount of it may be. Think about it. Light illuminates everything you see in life. Everything that you draw or capture is the act of capturing that light through your own perspective.