I don't know that particular phone, but on my cell phone my daughter found a 'light' option mixed in with the organization tools (calendar, alarms, calculator etc.). Try giving the phone to a 10-year-old and asking them to see if it has a light in it. ;)
Hope that helps.
I have never known what i want to be but i have always had some careers in mind that i might like. I chose my Gcses and am doing geography, food technology and religious education as well as the compulsory english, maths, french, double award science, english literature and additional maths but...