Most retrofit projects stall because ceiling conditions, fixture family continuity, and emergency backup coverage were not talked through early. This page is Satco's way of keeping those three threads visible before the purchase order leaves the desk.
Acoustic T-bar grid, drywall housing, surface mount, or legacy fluorescent troffer each point toward a different retrofit route. We start with the ceiling, not the SKU.
Portfolio upgrades feel calmer when A19, BR30, PAR30, troffer, and vanity families carry a recognizable line across buildings instead of drifting with each reorder.
UL 924 emergency drivers, combo exit and emergency units, and self-diagnostic modules need to live next to the retrofit lamps, not in a separate procurement silo.
| Route | When It Usually Fits | Friction to Watch |
|---|---|---|
| Lamp-Only Swap | Existing ballast is within service life and compatible with Type A LED. | Ballast end-of-life creeps up and causes nuisance failures. |
| Driver-Bypass Lamp | Ballast is aging, but housing and trim are still in good shape. | Field wiring change requires qualified electrician, not building engineer. |
| Retrofit Kit | Housing is solid, optics are tired, full swap is out of scope or budget. | Fit check on ceiling grid depth and J-box orientation. |
| Full-Fixture Replacement | Trim, optics, and housing all dated or mismatched across buildings. | Ceiling rework scope and tenant-occupied schedule. |
Retrofit specifiers disagree on these three questions more often than catalogs admit. Here is how the counter desk frames the trade-off before the SKU list is locked.
Prioritize efficacy: Higher lm/W lowers operating cost and helps meet utility rebate or sustainability targets on a portfolio retrofit. Prioritize comfort: Lower glare, tighter optics, and better UGR improve occupant satisfaction even when fixture efficacy drops a few lm/W. We usually lean comfort in tenant-occupied offices and efficacy in warehouse high-bay.
Choose wired: Deterministic 0-10V or DALI performance, easier enterprise integration, no battery-maintenance questions down the line. Choose wireless: Less conduit work, faster phased rollout, lower retrofit disruption on tenant floors. We pick wired when controls are part of a BMS handoff, wireless when the ceiling is already closed.
Integrated package: Single-vendor warranty, simpler procurement, one cut sheet per space. Modular stack: Separate fixture, driver, and control layers give swapability and tuning flexibility for future upgrades. Integrated tends to win on speed, modular on long-horizon portfolio serviceability.
Building type, fixture count, ceiling conditions, and the emergency coverage you already have on file are usually enough to start.