Wiktionary
bulbless
a. Without a bulb or bulbs.
Usage examples of "bulbless".
Then Cube suffered another bulbless realization: "You came here before us, Drek!
The bulbless hooded light fixtures hanging down on their wires gave the scene a weird unearthliness.
Textured walls, rounded archways, tin wall sconces, all of them bulbless.