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.
Caring for Hardwood Floors. Regular cleaning and caring for your hardwood floor will help protect your investment. Learn how to prevent scratches, keep dirt from building up, and what to do when. Avoid using water and vinegar, soap-based cleaners, wax or steam cleaners on your hardwood floor. 2  Vinegar and water will dull the floorâs finish over time, while soap or wax will leave a residue. 3  Steam cleaners put heat and excessive water on your floor, which can lead to cupping and long-term damage.