Yeah, PpFF (Photons per Football Field) are much easier to understand, especially if you have to divided them equally between a family of Base4.
For the Metric Heads, we here in Australia use the SI unit Photons per Olympic Swimming Pool, which unit of measure is the Centiquantalap, naturally.
Edit to add: Under the modern US customary measurement system, 1 drop is 1/72th of a US customary fluid dram, and 793 and 1000 conveniently have no common factors, so it should be self evident that 3 litres is 793/1000th of a US fluid gallon. Converting that to lux or lumens is left as an exercise for the reader.
For the Metric Heads, we here in Australia use the SI unit Photons per Olympic Swimming Pool, which unit of measure is the Centiquantalap, naturally.
Edit to add: Under the modern US customary measurement system, 1 drop is 1/72th of a US customary fluid dram, and 793 and 1000 conveniently have no common factors, so it should be self evident that 3 litres is 793/1000th of a US fluid gallon. Converting that to lux or lumens is left as an exercise for the reader.