Can I use your artwork to make Tubes?

Yes for personal use ONLY, not to be distributed in any way, especially online. This is because once tubes are distributed online there's no way to tell where the artwork came from, the artist receives no credit for their hard work, and no-one knows what the usage requirements for the artwork are.

Can I use your artwork to create websets and signatures?

Yes, provided your use is non-commercial, and the text "www.treelightstudios.com" appears somewhere on each signature or webset - this text doesn't have to be large but it does need to be clearly visible and readable. Proportional resizing, cropping and feathering is fine.