First off sorry if you all know how to do this but im guessing that if your reading this then you don't
So to be able to see in the dark on minecraft all you need to do is:
1.find out how to access your screen settings-i use the windows 7 OS so all i have to do is click on the little task bar icon in the bottom right hand arrow that extends the task bar and click on Intel(R) HD Graphics with the little icon of a computer screen.
2.After i have done this it takes you to to graphics and media control panel and from there you click on graphics properties and then go to Display and then colour enhancement and then go to the slider that has Gamma written next to it and slide it all the way up and there you have it you can now see in the dark in minecraft
Sorry for any spelling mistakes in the mini guide thing and also i was planning on puting images in to show you what i mean but the forum is being stupid and not letting me do it so sorry :/ and also sorry that it is only for windows 7 but if you ask me then i will do a guide for MAC users and also for people who are useing Windows XP and Windows Vista and also if anyone is running linux i will do it for that as well but i doubt anyone is running linux cause it sucks balls xD
Thanks:~Unbound