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.
Oil and grease stains that have penetrated the surface of unfinished wood are cleaned using tetrachloride, a dry cleaning spot remover. 1  Apply the tetrachloride to the stained area of the wood. 2  Following the grain of the wood, scrub with a stiff brush until the stain is removed. 3  Allow to dry. 4  Sand and finish as normal. Neutralize the bleaching by washing the wood with a solution of on tablespoon clear ammonia and 1 quart of water. 2  Use a clean, dry towel to dry the wood. 3  Rinse the wood with cool water and wipe dry with a towel. 4  Bleach raises wood grain, making the surface of the wood rough.