hey guys - im a new member, not that well versed in lighting terms. im a dental student looking to build a headlamp to use while working. the state of the art right now is 2200 footcandles, but it doesnt say at what distance. i will probably be working at a distance of approximately 3 feet with a viewing angle of about 4 square inches and i purchased a light that said it was 1000 footcandles. could anyone help me with what kind of footcandle rating that would be at 3 feet?
thanks so much.