There are a number of devices similar to the Hue dimmer switch which can work directly with the SmartThings hub. It just depends on whether you were using a US hub or a UK hub and whether you need dimming or just on/off. But you should have several choices in any case.
See the following thread (this is a clickable link). It includes both battery operated and mains powered devices, and both wallmount and hand held devices, so read the descriptions carefully to find what you want.