title: [An assembly line lighting survey analysis and its optimal illumination range research].
abstract: OBJECTIVE
  To investigate and analyze present conditions of the assembling line illumination in our country, and to set the recommended values of illuminance standard.
  
  
  METHODS
  Questionnaires and field surveys were used in this investigation. A total of 752 workers from seven factories in textile, shoes and electronics industries were selected for the questionnaire survey and site measurement, and corresponding analyses made with SPSS 13.0 statistic software.
  
  
  RESULTS
  Uniformity of illumination, definition in working face, general satisfactory degrees, asthenopia were significantly correlated with each other. Assembly line illuminances for five different visual characteristics were recommended in this paper. The illuminances were 500-1 000-1 500 lx, 300-500-1 000 lx, 200-300-750 lx, 100-300-500 lx, 50-100-200 lx, respectively.
  
  
  CONCLUSIONS
  Present conditions of the assembling line illumination are less than satisfactory, uniformity of illumination is on the low side, and there is no assembling line illuminance standard for general satisfactory degrees and asthenopia of workers. The related work should be further improved.
authors.affiliation: Department of Occupational and Environmental Health Sciences, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Xin-ning
authors.initials: XN
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Xu
authors.forename: Wei-wei
authors.initials: WW
authors.lastname: DU
authors.forename: Lei
authors.initials: L
authors.lastname: Cao
authors.forename: Sheng
authors.initials: S
authors.lastname: Wang
authors.forename: Xue-mei
authors.initials: XM
authors.lastname: Dong
authors.forename: Hou-han
authors.initials: HH
authors.lastname: Lu
authors.forename: Song-gen
authors.initials: SG
authors.lastname: Chen
authors.forename: Xiao-ou
authors.initials: XO
authors.lastname: Cao
authors.forename: Long-lian
authors.initials: LL
authors.lastname: Zhang
authors.forename: Li-hua
authors.initials: LH
authors.lastname: He
mesh_terms: D000328:Adult; D002681:China; D004581:Electronics; D005260:Female; D006801:Humans; D007221:Industry; D008029:Lighting / Q000592:standards*; D008297:Male; D016272:Occupational Health; D012775:Shoes; D011795:Surveys and Questionnaires; D013783:Textile Industry; D014786:Vision Disorders / Q000517:prevention & control*; D017132:Workplace