Dimmable light not bindable to dimmer widget

I just setup Ikea Tradfri lights, and have a dimmable bulb. The only widget it can be added into is Light. I can use it as a dimmer through the light widget, but I cannot bind it to a dimmer widget strangely.
This means I cannot bind as an up/down dimmer, as this is not an option in the light widget for some reason.