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.
How to Make Hardwood Floors Shine Without Toxic Chemicals. Chemicals aren't necessary to make wood floors shine. The deep shine and luster of a properly cleaned wood floor adds warmth to a room. Unfortunately, many wood floor cleaners contain toxic chemicals that you may not want in your home. Plain water won't clean the floors and make them shine. Water can actually damage the floor, depending on the finish, since the wood absorbs the moisture and swells.