You simply cannot buy a better tankless water heater. Each of the tankless water heaters on our shortlist is a top choice in its price/performance bracket. However, the overall winner of our âBest of the Bestâ award is definitely the Stiebel Eltron Tempra 24 Plus.
The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux.
The Difference Between Lumens and Lux. Lux is a measure of how many lumens are present in a given area. It's essentially a measure of photon density or light concentration.. A denser cloud of photons means there are more lumens present in a space--producing more brightness and higher lux.