It seems that Boat 8 made a lot of ground and got quite far from the rest. Meanwhile, 6 and 16 were near one another and 10, 12, 14, and 4 were all together. I think all of these but 8 were pretty close, because QM Hichens in Boat 6 says: "Some of the men in the boat said it was the cries of one boat hailing the other. I suppose the reason they said this was not to alarm the women - the ladies in the boat."(US Inquiry Day 5) Mr. Clench (who was in Boat 12) said: "...I told the women in the boats to keep quiet, and consoled them a bit. I told them it was men in the boats shouting out to the others, to keep them from getting away from one another."(US Inquiry Day 7)
With regards to lights, it seems that Boats 8 and 6 each got a light before leaving the ship, but Boat 8 had trouble with their lamp and ended up using an electric light instead. Major Peuchen in Boat 6 remembers seeing that. Boats 10, 12, 14, and 16 did not have lamps.