Scubaroo
Contributor
For anyone with the Halcyon ACB20 (ACB+) weight pockets, here's a cheap and simple way to mount a NiMH light canister without getting rid of the pockets. These smaller pockets lack the belt buckle of the ACB30 for attaching a canister, however I have been using this method with success for a number of dives now.
http://www.giddins.net/scuba/canister_light/canister_acb.htm
http://www.giddins.net/scuba/canister_light/canister_acb.htm