However, you could use these options depending on the context:
* A collection of lamps: This is the most straightforward option.
* A display of lamps: This emphasizes the visual aspect.
* A set of lamps: This implies they are coordinated or matched in some way.
* A constellation of lamps: This is a more poetic option, implying a variety of styles or sizes.
Ultimately, the best collective noun will depend on the specific situation and the desired effect.