Here are some numbers I have:

FW3A Aluminum CREE XPL HI 3D 52,41 gram

FW3T Ti / Cu CREE XPL HI 1A 84,39 gram

FW3C Cu Polished Nichia 219C 4000K 122,50 gram

FW3T Ti Polished CREE XPL HI 3D 74,46 gram

FW3C Cu Sandblasted Nichia 219C 4000K 123,41 gram

FW3T Stonewashed Luminus SST20 4000K 74,46 gram