$rayLight = new Ray($pntHit, new Vector());
				foreach (Light::$list as $lightName => $light) {
					$rayLight->directionVector = new Vector($light->position, $pntHit);
					$fLightProjection = $rayLight->directionVector->dotProduct($vctNormal);

					if ($fLightProjection <= 0){
						continue;
					}

					$lightDist = $rayLight->directionVector->dotProduct($rayLight->directionVector);
					//{
					if ($lightDist == 0) {
						continue;
					}
					$fTemp = invsqrt($lightDist);
					$lightRay->directionVector->multiply($fTemp);
					$fLightProjection = $fTemp * $fLightProjection;
					//}


					$inShadow = false;
					//{
					$t = $lightDist;
					foreach (Sphere::$list as $sphereName => $sphere) {
						if ($sphere->hitTest($rayLight, $t)) {
							$inShadow = true;
							break;
						}
					}
					//}
					
					if (!inShadow)
					{
						$lambert = $rayLight->directionVector->dotProduct($vctNormal) * $coef;
						$output = $light->colour->multiply($matCurrentMaterial->colour, true)->multiply($rayLight->directionVector->dotProduct($vctNormal) * $coef, true);

						$fViewProjection = $rayView->directionVector * $vctNormal;
						$blinnDir = $rayLight->directionVector - $rayView->directionVector;
						$fTemp = $blinnDir * $blinnDir;
						if ($fTemp != 0)
						{
							$blinn = invsqrt($fTemp) * max($fLightProjection - $fViewProjection , 0);
							$blinn = $coef * pow($blinn, $matCurrentMaterial->specularity);
							$output->add($matCurrentMaterial->specularColour->multiply($light->colour, true)->multiply($blinn, true));
						}
					}
				}
				
				

				
				
				
				
				$vctLightDist = new Vector($light->position, $pntNewStart);
				if ($vctNormal->dotProduct($vctLightDist) <= 0.0) {
					continue;
				}

				$t = sqrt($vctLightDist->dotProduct($vctLightDist));
				if ($t <= 0.0 ) {
					continue;
				}
				$rayLight = new Ray($pntNewStart, $vctLightDist->multiply(invsqrt($t), true));


				//Compute shadow
				$inShadow = false;
				foreach (Sphere::$list as $sphereName => $sphere) {
					if ($sphere->hitTest($rayLight, $t)) {
						$inShadow = true;
						break;
					}
				}
				if (!$inShadow) {
					// lambert
					$lambert = $rayLight->directionVector->dotProduct($vctNormal) * $coef;
					$output->add($light->colour->multiply($matCurrentMaterial->colour, true)->multiply($lambert));
				}