Garages, basements, shops, and sheds are all made more useful and hospitable with proper lighting. The best way to upgrade a dim work or storage space is to retrofit with overhead shop lights. But there are still many decisions to make, such as the number of fixtures needed, fixture length, bulb type, and color rendering. If you need to see true colors in the space, such as for painting or staining, look for a bulb with a high Color Rendering Index (CRI). On a scale of 0 to 100, the higher the CRI, the more faithfully colors are rendered. Bulbs with a CRI of 85 or higher will produce true color. Here are a few other variables to consider.