LED has inherent characteristics

such as vibration resistant

energy saving

no pollution

with luminous efficiency improving

LED application is constantly expanding

in particular

which has broad prospects in lighting.As the power of a single LED is very small

but in lighting

the uniform flux and illuminance in a certain region are required

so it is necessary to use LED array for increasing the brightness and luminous area and improving the uniformity of illuminance. The text firstly calculates LED array illuminance

and then according to formula

it makes simulation to the LED array and analyzes simulation results

which obtains the distributed characteristic of the different arrays and compares two kinds of arrays the characteristics. Finally it finds the suitable arrays to the different kinds of lamps and provides accurate reference for designing LED lamps.