Task lighting is generally understood as having the correct brightness to work by, so is often a focussed light or multiple lights providing the equivalent to around 100 Watts.
General or Ambient lighting is a light provided to illuminate a room, for example, it was common to find two 60 Watt bulbs in pendant fittings in a living room.
Accent lighting is often used to provide anything from a gentle glow, colour, to dramatic effects of shadow or highlighting textures.
