Over the lsat month, I have bought a bunch of candle dyes from various online retailers and am trying them out in my ebay and craigslist collection of about 12 lamps that i bought to tinker with. Dye blocks are $1-$5 each and 1oz bottles of liquid dye are around $5. Both are extremely concentrated and will color dozens of lamps. Usually about 10 drops is enough to color a 17". These are pics of the first day of flowage. It is hard to get a good pic of a flowing lamp. For some reason, the way I make them finds them a little cloudy for a day or two. They almost always clear up within 1-2 cycles. Still trying to perfect getting them to last. About 50% start sticking to the glass after 2-4 weeks of regular use.