public void setGreenLight(double newGreen)
			{
				if (newGreen == baseLightColours[GREEN])
					return;

				int difference = (int) newGreen - baseLightColours[GREEN];

				for (int x = 0; x < width; x++)
					for (int y = 0; y < height; y++)
						lightData[x][y][GREEN] += difference;

				baseLightColours[GREEN] = (int) newGreen;
			}