Access cover assemblies for luminaires

A luminaire comprising:

• a top luminaire portion;
• a bottom luminaire portion;
• an access cover assembly, wherein the access cover assembly comprises:
• a transition component comprising an access cover coupling feature and a bottom luminaire portion coupling feature,
• an access cover, wherein the access cover includes
• a body comprising a wall, wherein the wall forms a cavity with an open top and an open bottom,
• a transition component coupling feature configured to couple to the access cover coupling feature of the transition component, and
• a support component disposed within the cavity formed by the wall of the body when the access cover is in a closed position, and wherein the support component is configured to be exposed when the access cover is moved to an open position;
• and
• an operational component accessible to a user when the access cover coupling feature and the transition component coupling feature are decoupled from each other and when the access cover is moved toward the top luminaire portion, wherein the wall of the body of the access cover has a window disposed therein, and wherein the operational component uses the window to measure a parameter in an ambient environment outside the cavity formed by the body of the access cover when the access cover is in the closed position;
• wherein the body of the access cover has a first inner diameter that is larger than a first outer diameter of the top luminaire portion, and the bottom collar located along a bottom of the body has a second inner diameter that is larger than a second outer diameter of the top end of the bottom luminaire portion.