Sage Luminaires (and most Sage emergency fixtures) come in three configurations: BB, RE, and AC. The suffix you choose determines how the fixture gets emergency power.
BB — Battery Backup (unit equipment)
BB versions have an integral battery inside the fixture. When AC power fails, the fixture switches to its own battery for 90 minutes of emergency operation. No central battery system required.
Best for: small projects, retrofits, and locations where running new low-voltage infrastructure isn't feasible.
RE — Remote (central battery)
RE versions have no internal battery. They're powered by a Sage central battery system (Keystone, Volta, or Olympus) over low-voltage DC wiring. When AC fails, the central battery takes over.
Best for: multi-floor commercial buildings, projects where centralized maintenance and monitoring matter, and any installation already planning a Sage central battery system.
AC — AC Supply (no battery)
AC versions are normal-only luminaires that connect to standard 120/277 VAC. They don't switch to emergency power on their own — they're for general lighting only, paired with separate emergency fixtures or BB-equipped neighbors.
Best for: aesthetic continuity (a row of Sage Luminaires where only some need emergency duty), or general lighting in spaces where dedicated emergency fixtures handle code compliance separately.
How to spec it
On the spec sheet, the variant goes after the product code: ASP-BB-120 (Aspen, battery backup, 120V), PHO-RE-24 (Phoenix, remote off central battery, 24VDC), MLW-AC-277 (Onyx wall pack, AC supply, 277V). The interactive Ordering Code Builder on each product page lets you click your way to the exact SKU.