When a tenant improvement touches the lighting, current energy code generally requires the new work to meet today’s efficiency and controls standards — which in practice means LED fixtures with occupancy sensing and daylight response. That sounds like a constraint; it is usually the best value in the whole electrical scope.
Why the payback is strong
- LED draws 50–65% less power than the fluorescent or HID it replaces.
- Occupancy and daylight controls cut runtime further — often another 20–30%.
- Rated life of 50,000+ hours removes most relamping and ballast maintenance for the length of a typical lease.
- Utility rebates frequently cover a meaningful share of fixture cost — we file for them as part of the job.
On a typical office fit-out the lighting package pays for its upgrade premium in two to four years and keeps saving after that.
What code requires now
The specifics vary by jurisdiction and adopted code year, but the common threads are a lighting power density limit (watts per square foot), automatic shutoff, occupancy sensing in most rooms, and daylight-zone dimming near windows and skylights. We design to the current adopted code and document compliance for the permit set so plan check goes smoothly.
Retrofit vs full replacement
Where existing fixtures are sound and correctly located, LED retrofit kits or lamps can be the economical choice. Where the ceiling is being reworked, the layout is changing, or the existing fixtures are failing, new fixtures cost little more installed and give better light and controls. We price both against the actual space rather than assuming.