Using a conditional field with 'range'

I have a ‘range’ field (0-100), and when the value of that is below 100 I’d like to show an additional field.

In my blueprint I can show the additional field when the range is exactly any value but I don’t know the syntax for ‘less than’ a value. I’ve tried a few things and can’t find it in the docs.

          pagetransparency:
            label: Page Transparency
            type: range
            step: 5
            min: 0
            max: 100
            default: 0
          pageblur:
            label: Page Background Blur
            type: range
            step: 5
            min: 0
            max: 50
            default: 0
            when:
              pagetransparency: [less than 100]

Thanks in advance!

That’s nit possible, but check out the WhenQuery plugin

Thanks!