Spectrum OS 3.1 firmware released for LiteDimmer Spectrum AC600, AC/DC200, and AC/DC400 fixtures (update files, user guides, release notes, known-issues report, and DMX profiles provided)
steps
what you'll need: USB stick (no computer required on-set; LiteDimmer formats and uploads update files to USB from its own menu)
11. Download the Spectrum OS 3.1A1 Update Files ZIP from https://www.litegear.com/download/583/spectrum-os-3-1/47427/spectrum-%20os-3-1a1-update-files.zip
22. Extract the ZIP to a FAT32-formatted USB stick OR use the LiteDimmer's built-in USB formatting tool to prepare the stick and upload the OS files directly.
33. Insert the prepared USB stick into the USB-A port on the LiteDimmer Spectrum (AC600, AC/DC200, or AC/DC400).
44. Navigate to the update section in the LiteDimmer Spectrum menu.
55. Follow on-screen prompts to install the update. Refer to the model-specific Installation Guide for exact menu navigation: AC/DC 200 & 400 guide at https://www.litegear.com/download/583/spectrum-os-3-1/45932/litedimmer-spectrum-ac-dc-200-and-400-installation-guide-spectrum-os-3-1.pdf and AC600 guide at https://www.litegear.com/download/583/spectrum-os-3-1/45933/litedimmer-spectrum-ac-600-installation-guide-spectrum-os-3-1.pdf
66. After update completes, verify firmware version in the LiteDimmer display menu.
77. Review the Known Issues Report (https://www.litegear.com/download/583/spectrum-os-3-1/47428/known-issues-report-spectrum-os-3-1a1.pdf) before use on set.
GotchaSpectrum OS 3.1 is NOT compatible with the older LiteDimmer Spectrum DC200 (2019 model); that unit uses OS 2.x only.
GotchaLiteMat Plus and LiteMat S2 use different controller families (LiteDimmer Plus and LiteDimmer Pro respectively), Spectrum OS does NOT apply to those fixtures; no firmware update is published for those controllers on litegear.com.
GotchaThe Auroris product page references 'Spectrum OS 2.8' but that page appears outdated; the current download page lists 3.1A1 as the current release and lists Auroris as a compatible device.
GotchaFixture pixel driver firmware (inside LiteMat Spectrum panels) is separate from LiteDimmer OS. The LiteMat Spectrum page notes 'updatable pixel driver firmware' but no standalone pixel driver download is listed publicly.
GotchaThe applies_to list for this train assumes LiteMat Plus fixtures in catalog are driven by LiteDimmer Spectrum controllers. LiteMat Plus hardware itself is passive (no onboard firmware); the Spectrum OS trains apply to the controlling LiteDimmer. Verify which dimmer is paired in practice.
GotchaLiteTile Plus is NOT listed on the Spectrum OS compatibility page. It may use a different control path. Treat as unconfirmed.
GotchaConsole profiles (ETC EOS, GrandMA2) bundled with OS 3.0 download, check if 3.1-specific profiles are needed; only OS 3.0 console profile ZIPs are listed on the downloads page.