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.
1 lux equals 1 Lumen/m2, in other words - light intensity in a specific area. Lux is used to measure the amount of light output in a given area - one lux is equal to one lumen per square meter. It enables us to measure the total amount of visible light present and the intensity of the illumination on a surface.