Is the Luxor ZD worth it over a plain transformer?

If you want per-zone dimming and scheduling across many fixtures, yes. A plain transformer only switches power on and off, while the ZD lets you tune each of up to 250 groups.

Do I need the Wi-Fi module for app control?

Yes. The Luxor ZD is set up on its LCD by default. iOS and Android control requires the optional Wi-Fi module, which uses 802.11b/g.

Will it work with my existing fixtures?

Only if they are FX ZD LED fixtures. The controller is not compatible with other brands or non-ZD FX fixtures.

What power size should I pick?

Choose the 150 W or 300 W version based on the total wattage of your connected ZD fixtures, with some headroom for future additions.

How does the astronomical timing work?

You enter your location on the map, and the controller shifts on and off times with sunrise and sunset through the year. You can also set event-based schedules.

Only one store lists it new, at $264.35 at Amazon as of November 8, 2026. With a single seller there is little discounting, so watch that listing rather than expecting store-to-store price wars.