It depends on the atmosphere of the store. For example, Best buy uses automated lighting with dimmable ballasts to maintain a light level of 55 foot candles.
Lumens and foot candles are not the same. A lumen is a measurement of the intensity of light, a foot candle is a measurement of lumens per square foot.
foot - candles
500 candelas at 1 foot distance
23.33333_ lux
40 watt
Foot candles
Various retail businesses use revenue per square foot to evaluate their performance against industry standards, prepare projections or to select a store location. Total Annual Sales divided by Total Square Feet (of the store) = Revenue per square foot.
Foot traffic
Light intensities are usually measured in candle power. What that means is the equivalent of the light of one candle, measured at a distance of one foot, sometimes called, `foot candles' or `candellas'. +++ In the SI system the flux or "amount" of light, is measured in lumen; and the illuminence or brightness of the light, on a surface in lumens per square metre, a compound unit called the lux.
in foot-candles. i.e. the brightness of a candle one foot away
This would vary greatly depending on the type of store and it's location. However, if you make some assumptions you could estimate as follows: If a retail store in a certain area generates $250 in sales per square foot per year, and their cost is 60% of sales, then total inventory for the year would be $150. If you want inventory to turn 12 times per year, you should have 12.50 of inventory per square foot on hand. Change these assumptions and do the same calculation.
it is suggested my professionals that you should dip your foot in frog pee for about 30 minutes.