<prompt> All of the following are components of Lights criteria for pleural effusion except:Effusion proteinserum protein ratio greater than 0.5Effusion lactate dehydrogenase LDHserum LDH ratio greater than 0.6Effusion LDH level greater than two-thirds the upper limit of the laboratorys reference range of serum LDHEffusion sugar is less than 23rd of blood sugar  <response>: LIGHT CRITERIA Pleural fluid proteinSerum protein 0.5 Pleural fluid LDHSerum LDH 0.6 Pleural fluid LDH more than two-thirds normal upper limit for serum Exudative pleural effusions meet at least one of the following criteria, whereas transudative pleural effusions meet none These criteria misidentify 25 of transudates as exudates. 