Neil,

If you have enough voltage, it's easier to put the LEDs in series which
puts the same current through each.

The emitter is shown at
http://www.uslinc.com/index.php?page=3Dshop.product_details&flypage=3Dflypa=
ge.tpl&product_id=3D44&category_id=3D21&option=3Dcom_virtuemart&Itemid=3D10=
6
.. It carries hearing impaired audio, visually impaired audio, and closed
captions in movie theaters.

Harold



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