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.
Lux is the SI unit of measurement of illuminance, i.e. the total luminous flux incident on a unit surface area. It is a measure of how much the incident light illuminates the surface and gives an indication to the perception of the intensity of the light by a human eye.