You may have connected more than 60W of lights to your controller

1. Check how many lights are currently connected to your controller
2. Take note of how many watts (W) each of these lights will consume
3. If the total exceeds 60W, you will need another controller or transformer to power your entire system

You may have extended a daisy chain set too far

Value pack spotlights (4 x 3W) and deck light sets (6 lights) come with a single cable 'end light'  - if you extend the chain too far you can have issues including voltage drop and loss of sync for the lights in the chain.

Please do not extend chains of spotlights, and keep deck light chains to 12 (or less) lights.  

You may be using too much cabling

If your system is running up to 60W worth of lighting, we recommend using a maximum of 75 metres of cabling to avoid a drop in voltage and dimmer lighting.