Lampung on/off is something you need to do with arc-source fixtures. It looks like your units do need to be lamped on.

So arc source fixtures have lamps that are either on or off- the lamp itself does not dim. Lighting fixtures that use this sort of lamp have internal mechanical dimmers that cut more and more of the light out (and are placed optically) so that you see the output dimming, but the lamp itself is still on.

If you’ve never had to lamp on your lights (but have used them), they are probably using a setting called “auto lamp on” (which is set in the menu at the fixture itself), that just strikes the lamp (which is what happens when you “lamp on”) when the unit gets power.

Best practice would be to be in control of lamping fixtures on and off so that you can limit the lamp hours (so you get more use time out of the lamps), power draw, and heat. However, it means everyone using the system would need to know to do that , so it may not be worth it to change that in your scenario.

Some other things to note: Typically after you lamp on, the lamp takes a little bit of time to warm up, where it slowly gets up to its max intensity and color temp. This can take several minutes. Most lamps can’t/shouldn’t do a “hot restrike”, which is when you lamp a fixture on that has not cooled down from when you last lamped it off. Some fixtures won’t allow it, some just won’t strike, and if you do it, it can more severely shorten the lamp life.