Sequence dimmer module

I am looking to automatically dim a cluster of lights (30 in total). The idea is to have 15 lights of the 30 fading on, whilst the other 15 lights fade off. The idea is for a showroom window display in London. Can you please advise whether there is a dimmer module which can be programmed to continuously fade on and off? Hopefully you can help - Matthew

What kind of lights would you like to dim? Please provide detailed info.

LED GLS Bulbs 240V E27 A60 1.4w per bulb

Wat kind of dimmer do they require?