How to install in-ground landscape lights in concrete

Submitted by Phil on Sun, 04/27/2008 - 21:53.

April 27, 2008

As we mentioned in our previous article, installation of in-ground landscape lights requires special consideration. When installing a fixture underground one must take into consideration such items as grade and drainage.

Step-by-step instructions for installing in-ground landscape fixtures in concrete

  1. Remove trim ring and all internal components from fixture housing, except for the moisture absorbing dessicant pack attached to the side of the housing. Set these items aside.
  2. Position the fixture housing into the concrete pour accessory making sure that the underside of the housing flange rests on top of the set screws. Tighten the set screws on the side of the accessory to lock the the housing into place. (Be careful not to over tighten.) Secure the assembly to the final location with re-bar or other anchoring device.
  3. Excavate soil where the fixture is to be installed. Dig a trench 18" deep if installing conduit.
  4. Place assembly into hole. Be sure there is a minimum of 3" of drainage material (sand or gravel only) covering the bottom of the hole.
  5. Install the conduit to the housing using a watertight fitting and pull supply wires through into the housing.
  6. Press duct seal compound into wire entryway and then fill the entire entryway with two-part potting compound to seal the conduit entry point from moisture.
  7. Place the dirt cover on the fixture to prevent gravel and concrete falling into the fixture housing.
  8. Fill area with a minimum of 3" of drainage material. Be sure not to fill area flush with top of frame and assembly. This is to be filled with concrete.
  9. Pour concrete. Remember that fixture position cannot be altered after the concrete sets.

    10. Once the concrete has set and is completely cured, remove dirt cover from fixture and install electrical components. Use silicon wire nuts to connect supply wire to fixture wire.

  10. Install specified lamp and then replace gasketed lens, making certain there is no debris between the gasket and the housing. Install trim ring or rock guard per installation instructions.