The engineer in me isn't in tune with the guy making all the scracthy noises going along with the 'painting' style tho.
LED strips are probably not able to light up a canvas evenly, or at all beyond the edges. You need something more like an RGB PAR can or two, aimed at the canvas from above and back. Or an RGB wall-washer, aimed at the canvas from the floor. They can be found on eBay or American DJ pretty easily.
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