Very, very bright. Yes, as bright as this!
I have now progressed to wearing an elbow brace because of my cotton-yarn induced arm muscle pain (on just my right arm). Odd. Last night it hurt so much I had trouble going to sleep. I need to be consistent with ibuprofin, and any additional tips for whatever is wrong with the arm are appreciated. I think the only solution, though, is the one I don't want to hear.*
*to stop knitting.