Is there any chance yours is an SC51w or SC51c and the gift one is an SC51 (cool white) ? The cool white is brighter than the neutral SC51w, while the hiCRI SC51c is significantly less bright than either (but more effiicient on the lower settings).
why do you guys always think no one knows what they're talking about? it's like when i say that the ld10 r4 is brighter than the ld10 r5 and everyone assumes i'm an idiot, it's got nothing to do with the manufacturer claimed output, i've got the lights, (and there's threads on that going around here) and the ld20 r5 is much brighter than the ld20 r4, doesn't make any sense considering the ld10's but it's fact, because i have the lights, so i can see
no there's no chance that they are different models, i wouldn't buy an sc51w or a low output hi cri, the tint on both these regular ones is perfect. how would i not know what i'm buying man?