accessing arrays by variable in GLSL

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C++

OpenGL

GLSL

Hi,
I'm writing a Phong shader with multiple lights. I send a uniform array to both vertex and fragment shaders. Let's say one of the arrays is

uniform vec3 lights[8];

then I loop over it in the program, for example:

vec3 color=0;
for (i=0;i<8;++i)
{
 color=color+lights[i];
}

and it doesn't work properly.

I've noticed that even

int j=0; vec3 v=lighs[j];

doesn't work ok, while:

vec3 v=lights[0]; 

works fine.

What should I do?


*It's a runtime error- The results are not correct