light —
SGI Light/Entry/Starter (LG1/LG2) graphics controller
light* at gio? slot ?
wsdisplay* at light? console ?
The light driver supports the SGI Light series of
  graphics controllers, also known as Entry or Starter graphics and designated
  LG1 or LG2. These controllers have a fixed 1024x768 resolution with 8-bit
  colour depth. Unlike most SGI offerings, both 13w3 and VGA video cables are
  supported. light is found in Indigo and Crimson
  machines.
The light driver first appeared in
  NetBSD 5.0.
Stephen M. Rumble wrote this driver.
Much is unknown about the REX chipset. Therefore, the driver relies on the PROM
  to properly initialise the graphics.
This driver will not run without modification on Crimson
  machines.