Move sideways. According to the query "Discussion and application of installation technology of deep downlight for airport navigation aid", it can be known that the cable entry mode of embedded deep downlight used in airport usually adopts the side wall entry mode, because the side wall entry can avoid the phenomenon that the deep downlight protrudes from the pavement after the pavement concrete is poured, and the bottom wall entry will make the deep downlight protrude from the pavement to a great extent, so the side wall entry is good.