I need to display one article within my book that is in double space, like what is a basic requirement in US colleges for turning in papers. Basically, I need readers to have lots of space above the text to be able to write some notes above every line.

This is a line of text.
% <-- here is the space between lines
% <-- this space here is as tall as a line of text.
% <-- here is the next space between lines
This is the next visible line of text.

The closest I can get is the "big" setting in `\setupinterlinespace`, but it isn't big enough. I've also tried manual measurements in cm, but I have no idea which setting is typographically good.

\setupinterlinespace[on, big]
    \startlinenumbering
        \input article
    \stoplinenumbering
\setupinterlinespace[off]

How can I achieve double space text in ConTeXt?
--Joel