Board Thread:Questions and Answers/@comment-71.222.165.194-20130217215639/@comment-13413401-20130806135156

Just place the assembly table somewhere in a room with a chest next to it. Then place your lasers anywhere within 5 blocks of the table. Then you have send the Buildcraft power to the Lasers, not the table. When the table has work to do, the lasers will power it. The color of the laser will be different based on how much power is flowing into them from the pipes.