Cree retrofitted some existing XP-G designs with XP-G2 to show how the increase in efficiency of the XP-G2 effects real world applications. Cree took a commercial design with 4 XP-Gs and retrofitted it with 4 XP-G2s. The result was an increase in lumens (lm) from 400 lm to 515 lm and an increase in efficacy from 61 LPW to 78 LPW, both of which are an increase over 25%. In addition, one could also go from 4 original XP-Gs to 3 XP-G2s and still get 10% more light than the original and over 15% better efficacy. Again this illustrates the drop-in performance upgrade when using the XP-G2 in XP-G designs.