Lamp and photoperiod surprises

Lamp on in the dark period, lamp off in the window, catch-up turning it on, hub clock invalid, the 4×8's plug-switched lamp, and lamp plugs holding state.

Do this first: check Settings › System › Time. A CLOCK INVALID hub explains most lamp surprises. A lamp on in the dark period is critical: clear any hold first (see Lamp on in the dark period below).

That is catch-up: the hub makes up missed lit hours, and releasing a hold during catch-up turns the lamp on. The desk's Cancel catch-up is a toggle shown while a catch-up is running, with a confirm. It writes off the hours still owed for this cycle only, tomorrow's schedule is unchanged, and it does not switch the lamp off by itself. If the toggle is missing, your hub lacks the control: keep the hold on until the window passes, or accept the catch-up.

1. Manual light hold on? Clear it (the roll-on dialog tells you what will happen).
2. Auto photoperiod off under Settings › Light?
3. Hub clock invalid (Settings › System › Time): the hub thinks it is a different time. Let it reach network time (the Pi answers time requests for the kit, or give it internet). While its clock is invalid the hub leaves the lamp exactly as it is, including across lights-off, so a lit lamp stays lit.
4. The SF1000's own dimming knob at zero: the lamp's hardware overrides the hub. The light control path row says so.
5. A dark period violation guard: the hub refuses to light inside the minimum dark hours.
6. A Safety cut-off is active: a smoke, gas or CO alarm carrying that task switched the lamp plugs (Lamp plug · 4×8, Lamp plug · 2×4) off and holds them off until you release it under Settings › Devices › Zigbee › Safety cut-off. Hub-dimmed fixtures are not cut.

A hold left on, a manual toggle, or a lamp plug with an on schedule left in the vendor app. Clear the hold; remove any on-schedule from the plug (keep only an off-only schedule).

The 4×8 tent holds two lamps: one dimmed by the hub and one switched by a smart plug on the hub's clock. Bind that plug to the Lamp plug · 4×8 role: the brain switches it from the hub's window, and the Light desk counts the 4×8's hours from the plug's reported on-time (Got · Lamp plug). That is power at the socket, not a light reading. With no plug the hours come from the photoperiod window (Got · Window). Black camera frames do not prove a dark tent either.

A Tuya or Zigbee plug holds its last state when the brain stops. The off-only schedule on the plug is the backstop; set one.

Guide contents  ·  Troubleshooting  ·  Where to start  ·  Digital Stealth Care

DSC-Brain user guide · Lamp and photoperiod surprises · this page is edited on the site; the Notion original was retired after the mirror