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\usebodyfont[alegreya-light]
\usebodyfont[alegreya-medium]

\setupbodyfont[alegreya]

\setuplayout[tight]

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     \switchtobodyfont[alegreya-light]        \input tufte \par
     \switchtobodyfont[alegreya]              \input tufte \par
     \switchtobodyfont[alegreya-medium]       \input tufte \par
     \switchtobodyfont[alegreya-light,sans]   \input tufte \par
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\stoptext


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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