EULUMDAT is a data file format used for specification of photometric data especially intensity distributions from light sources such as lamps and luminaries. The file extension is .ldt. The format was proposed by Axel Stockmar (Light Consult Inc., Berlin) in 1990. The format is the European equivalent to the IES file format specified in IESNA LM-63. The data in an EULUMDAT file is usually measured using a goniophotometer.
Sweep or Vacuum Dirt Daily. Removing the dirt, sand or dust that is tracked in on a daily basis should be done every day. That's right, every single day. The best way to keep your hardwood floors clean and prevent damage is to sweep or vacuum them daily.
Vinegar is used as a floor cleaner because it contains acetic acid. Itâs this ingredient that helps you remove the grime and dirt without any problematic residue. So hereâs how to clean hardwood floors with vinegar. Some experts suggest a mix of a half cup of white vinegar to a gallon of warm water in a bucket. Then you can use a sponge mop, preferably one that comes with a spring-type wringer.