i tried a cool tube this summer for my HPS 250W because i had some heat issue, just droped the temperature from 1°C to 2°C wich was not enough, so finnally i switched to LED wich significantly imporved my issue with heat.
i tried a cool tube this summer for my HPS 250W because i had some heat issue, just droped the temperature from 1°C to 2°C wich was not enough, so finnally i switched to LED wich significantly imporved my issue with heat.