I’ve spent a lot of time looking at light spectrums (rainbows). The name rainbow makes a lot of sense when looking at an arc of color in the sky. What I’m looking at are created by prisms. Light is refracted in the medium of lead crystal glass instead of atmospheric water. I have experimented with different types of light (LED, halogen, xenon, incandescent) only to find that nothing works better than the sun. You need full spectrum (white light made from components) to have light for the prism to split. So we want direct sunlight. Hanging location becomes critical and I’ve battled positions around our house and elsewhere. The best result happens when the prism suncatcher is in FULL sun and the light spectrums can land in shade. The contrast is as much as a flashlight into the dark.  To make this easy, I supply a cup hook with each prism suncatcher (as well as nails and a lanyard clip). The cup hook screws easily into wood or drywall. The point is fine and it can be screwed all the way in with a strong hand. If you’re going into oak or ash then get a pair of pliers. Easy is because the little hook can be place almost anywhere and the chain fits right over it. You can adjust the chain to move the suncatcher up or down into the light. You can unscrew the cup hook and pick another location if you discover something better. Trees are a problem in our neighborhood. I love trees but they block the light. Same with clouds. If you’re in California, Texas, Florida you will find success easily. Rainy states not so much. Winter or Summer doesn’t matter. We get sunny crisp days in the Winter that are below zero and the SunRain does great. Good news is the energy to run your prism suncatcher is FREE. The strength of the light spectrums corresponds to how much direct sun is getting through. It doesn’t work in plain daylight – it needs to be in direct full sunlight.