The WT1-niche fits into a puddle flange via the 2inch BSP thread
The lamp simply inserts into the niche and is held in place via the O ring
IP68 cable gland plus conduit fixing at the rear.

The WT4-niche is concreted in place or core drill into place
The lamp simply inserts into the niche and is held in place via the O ring.
IP68 cable gland plus conduit fixing at the rear.

The WT3-instalation kit comprises of 1 ¼ inch BSP pipe,
end cap with predetermined length of conduit IP68 conduit.
The lamp simply inserts into the pipe and is held in place via the O ring.