Sat in the "Office" and minding my work on a high voltage wire model. When a Interior designer storm in cause he had problem! Oh dear a arty guy with a math problem. He has a room 18X12X3,5 meter and his contractor has stipulated that at 0,8m there must be 100 to 150 lux as a mean value. We call it hallway lighting. This was at 10:00h.
After dragging my calculator out of its casing and turned it on. I did some math. I used n=(E*A)/(¤*N). thats the normal efficiency formula. E= desired lighting condition in lux A= area in square m ¤=flow of lamps N= number of lamps. Shake the formula then I got this N=(E*A)/(¤*n) I got th info that they wanted a lamp with ¤=6000lm and at least 40% efficiency and the room is 216m
2.
dunked that in and got that I needed 8 pieces of fixtures.
So I punch that in to my 3D render and placed the room and fixtures and gave them a report. If they follow my plan then they got 115lux as a average light at 0,8m.
Did a short report and some economic calculation and wiring plan and material cost estimate and mailed that to them at 14:00h.
Math is good. I think I can get a reward and a treat fore that!
Engineers is ruling the world.