The websites are slightly misleading. It says g/pr (pr = pair?)on SJS but on another site 129 g/pc (pc = piece i.e. per pedal?).
I'd be inclined to believe 129g per pedal (otherwise its just too good to be true, they would be lighter than top end carbon jobbies) and in that case, they are light yes, but only by a few grams compared with some similarly priced bigger brands products. All in all, they will probly do the job. My personal opinion is, that for the sake of 30-50g, you wont notice the difference at all and with that in mind, I'd rather go with a big brand, but thats just my opinion.