GLED exposure decreased the numeric pain scale (NPS). (a) WLED did produce a slight reduction in the NPS for the chronic migraine group (n[WLED]epi = 8, n[WLED]chro = 21). (b) GLED exposure produced a greater and statistically significant reduction in the NPS in both episodic and chronic migraine groups (n[GLED]epi = 7, n[GLED]chro = 22). Data presented as Average ± SEM, standard error of the mean (Wilcoxon matched-pairs signed rank test, *p<0.05, ***p<0.001).