I'm not sure if this is me of the game (v0.9.5.7) - I've made and placed two simple lamps and they aren't lit. When I did this on a different world they simple lamp was always on. I'm playing survival mode.
I've tried clicking and F-key but I'm at a loss.
Thanks for any help.
Edit: I changed computer (to my big one with real graphics) and I can see the light effect but the bulbs don't show as being lit ... maybe the light effect is my gamma setting.