Step 04 — The purchase
Buy the light the data chose.
Most lighting specifications die between approval and installation — substituted, trimmed, value-engineered into something that carries the same catalog numbers and none of the performance. The last step of the program is making sure yours survives the trip.
How sourcing works
From proven scheme to delivered light
Specify
The proven scheme, written as a spec
The pilot result becomes a performance specification: melanopic targets through the occupied day, the control behavior that produced them, and the acceptance criteria a delivered installation has to meet. Written in performance terms, so alternates are judged on what they deliver rather than on what they cost.
Source
Taking it to vendors
We take that specification to market with you — comparing proposals against the modeled performance, reading the photometric claims behind them, and flagging where a substitution quietly gives up the circadian correction the case was built on.
Hold
Acceptance against the numbers
When the installation lands, it gets measured against the same baseline as the pilot. Value engineering doesn't stop at the purchase order, so the last step is the one that makes the first four count: proving the building got the light it paid for.
Where we stand
We’re paid for the analysis, not the fixtures
Our judgment about what your building needs is formed before any vendor is in the room — in the measurement, the model, and a week of pilot data. Sourcing support exists because a specification that nobody defends through procurement is a specification that gets cut.
If a proposal meets the performance the pilot proved, it clears — whoever it comes from.
Don’t let the last step undo the first four.
Whether you’re at the start of the program or holding a spec that’s about to be value-engineered, a 20-minute review is the place to begin.