为了验证小尺寸光源的不舒适眩光评估模型对LED的适用性，使用两种色温的白光LED产生不舒适眩光，在4种眩光源亮度和4种观察角度下进行实验，并在每种条件下进行deBoer评分。实验结果表明，白光LED的偏心角增大，会增加亮度对比度；白光LED的亮度越大，偏心角越小，则deBoer评分越高，即产生更多的不舒适眩光。对小尺寸光源模型UGRsmall以及位置系数修正模型UGRS1和UGRS2进行实验验证，结果表明模型计算值与主观实验不舒适眩光评分的相关性较高。将UGRS2模型增加优化系数并进行优化得到模型UGRSa，将偏心角加入模型UGRsmall并修正后得到UGRSk，UGRSa和UGRSk均具有更好的性能。

In order to verify the applicability of the discomfort glare evaluation model of small size light source to LED, the discomfort glare is generated by white LED of two kinds of color temperature. The experiment is conducted under four kinds of glare luminance and viewing angles. Observers are asked to give a deBoer rating score under each condition. The results show that lager eccentric angle of white LED leads to lager contrast ratio. Lager glare luminance and smaller eccentric angle lead to higher deBore rating score, namely more discomfort glare. The small size light source model UGRsmall and the position coefficient modified models UGRS1 and UGRS2 are verified experimentally. The results show the high correlation between the calculated value of the model and the subjective experiment of discomfort glare rating. Further, model UGRSa is obtained by adding optimal coefficients of UGRS2 and optimizing them. Model UGRSk is obtained by adding eccentric angle into model UGRsmall and correcting it. UGRSa and UGRSk both have better performance.