Use the selected unit throughout. Changing units converts your entries.
See a quick calculation example
Calculation example only: 120 in ceiling-to-floor − 84 in entered clearance = 36 in maximum planned drop. These are fictional inputs, not recommended clearance or product dimensions.
Optional: compare measurements from your selected light
Have the selected option’s drawing? Add its measurements below. If not, leave these fields blank and plan your space first.
Measure from the ceiling mounting surface to the lowest point of the assembled fixture, including its mounting parts and bulbs where applicable. Do not use body height alone.
Which length should I enter?
Measure from the ceiling mounting surface to the lowest point of the assembled fixture, including its mounting parts and bulbs where applicable. Do not use body height alone.
Optional: check stair opening space
Measure between the opening’s inside edges, allowing for projecting railings. Measure the light’s widest span in the same direction.
Space on each side = (opening width − light width) ÷ 2
W: opening width. F: widest light width. g: space on each side when centred.
For a centred light only. Check the other direction and any obstacles separately; for an off-centre light, measure each side. This is not a safety clearance or fit approval.
See a quick calculation example
Calculation example only: A 120 in opening and a 30 in-wide light leave 45 in on each side if centred. If a confirmed selected-light width is available, Load example uses that width instead. This is not a safety check or product-fit verdict.
Generic measuring example only; not this product, not to scale and not an installation drawing.
