Click & Grow 9 device, is the lamp fixture raise-able?

I am wanting to know if on the 9 plant device, is the lamp fixture over the pods able to be raised to accommodate when the plants grow larger/taller? So far as I have been able to try this, it does not raise higher, or mine is stuck.

You can buy extension arms if you need them: Smart Garden 9 Extension Arms – Click & Grow EU


Thank you! I thought there should be some in my original package, but when there weren’t I was really wondering!