Smart things are those that can be controlled by Apps. They offer different feature sets which may include colour or brightness changing, on/off control ect etc. Some are Bluetooth some are WiFi etc so check before you buy if the item is going to work with your system.
usually the PDF attachments explain if the items are committable with Alexa, Home Hub or Google etc.
LED Firesafe Smart Downlight 8.5W 3000K-6500K Dimmable Wifi Control
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