RORO01 Thank you very much for your reply. It is also possible to move this widget, like any other one, from the widget bar to the desktop by clicking and holding the widget in the bar, pressing the F12 key and then releasing the mouse button (for other users - the next time you prompt the dashboard, the widget is swept back into the dashboard layer). The problem with both methods - DevMode widget & the one I have described here - is that the surrounding lights appear above the menu bar and even above the Dock. However, your suggestion is perfect for hanging lights.
(Version 3.1)