Arduino Mega 2560 + LCD 1602

LCD 16x2

Screen for arduino for 2 lines of 16 characters
Module dimensions: 80.0 x 36.0 x 14.5
Dimensions of the working area of the screen: 64.5 x 14.5

LCD contct LCD pin Arduino pin
1 VSS GND-16
2 VDD 5V-22
3 V0 GND-0 (contrast display)
4 RS 7
5 RW GND-1
6 E 8
7 D4 5
8 D5 4
9 D6 3
10 D7 2

#include <liquidcrystal.h>
LiquidCrystal lcd(7, 8, 5, 4, 3, 2);
void setup() {
lcd.begin(16, 2);
lcd.setCursor(0,1);
lcd.write("LIGHT: ");
}
void loop() { }

To improve the brightness of the LCD Display see http://arduino-diy.com/arduino-zhidkokristallicheskiy-displey-LCD-1602