I've been kinda scheming on this but didn't know where to ask, this thread seems relevent. How hard/possible would it be to make a ~1m tube of 1 -3cm diameter,

I've been kinda scheming on this but didn't know where to ask, this thread seems relevent. How hard/possible would it be to make a ~1m tube of 1 -3cm diameter, with a LED strip suspended down the centerline. a charcoal filter and a very light fan on one end, and face-mask on the other end. the fan and LED could be powered by an 18650 dangling from a lanyard/necklace. some kind of valve in the face mask would have to vent your exhales and then toggle for the inhales to draw through the tube. How far off am I on the parts? You can get a 10Wh 18650, can you run a 1 meter strip of UV LEDs at 5 or 10W? Would that be enough power at the right distance (radius) and for enough time (an inhale would draw air through quickly) to do the job?