hi all, can someone tell me
what is the correct way to place T5 tube on the L-box for light through, so that it appear straight/parallel when lights on, and at the same time without black spot in between.

Reason, if tubes are to be overlapped, it eliminate dark spot between tubes, but lights appears zig-zag when turned on. On the other hand, to make it straight thus do away with the overlapping, there would be dark spot between tubes. Guess those who had done it will understand my prob.

Thx