So for those of you who dont know, a mote of light is a type of currency used to get engrams from xur as well as some cool class items from the speaker. i found out recently that during the new Crotas End raid that if you dismantle a mote of light during The Pit part of the Raid, it will actually remove the weight of Darkness for a little bit. Eventually you will get the weight of darkness back, but then you dismantle another mote of light and then your weight of darkness is removed again.