This is the first power I'm giving to Clark that isn't really canon, I guess, it would make sense that he cold see more varieties of light than the average human, especially given his 'x-ray' vision, but, to my limited knowledge, the mechanics for that are never really explained.
Links I used for this:
https://bybio.wordpress.com/2013/09/09/yellow-blue-green-right/http://blog.nature.org/science/2015/08/17/field-guide-wrong-birds-eye-view-world-color-vision/The Starling in simulated UV vision:
http://photographyoftheinvisiblewor...ropean-starling-sturnus-vulgaris-in.htmlBlack-Eyed Susan in UV:
http://www.naturfotograf.com/UV_RUDB_HIR.htmlDandelion in UV:
http://www.naturfotograf.com/UV_TARA_VUL.htmlI was tempted to add a scene with adult Clark reading some of these articles and realizing what exactly he'd been seeing all along =)