Looking at the picture here and judging by the stems of your plants, they get really long when they are too far away from the light. The long stems are indicators that your light is too far away and you need to bring it closer for maximum efficiency. To bring down the temperature you may want to look in to more fans for air circulation. Also make sure that your exhaust air is going outside of the room that you were growing in. This helps play the role in optimal environment conditions.