Unfortunately, we don't stock dimmer units, however, the LEDs used in our Pro Series products are dimmable and we recommend using an inline waterproof LED dimmer unit that is able to work with the correct wattage of the total light string installation.
This inline LED dimmer should be installed, bespoke by a qualified electrician. To help, our manufacturer has confirmed the following:
Any dimmer with 230V output will work with the Pro Series lights. Prior to installation please ensure the dimmer unit purchased is able to work within the maximum wattage capacity of that particular model prior to connecting to the lights. For Pro Series lights this is 4.6W per 5m string (50 LEDs)
Given the variation in the length of displays that can be created with Pro Series lights (from 5m - 200m), and as this will be different for individual customers, we do not stock an LED dimmer unit as there would be too many variants of use.
You can find a reputable electrician by visiting The National Inspection Council for Electrical Installation Contracting, one of several organisations which regulates the training and work of electrical enterprises in the UK. Here's a link to their website: http://www.niceic.com/
I hope this is of help and should you have any other questions please do reply to this e-mail as we would be very happy to help.