The 250w Red CFL Bulb is a lower wattage light source for the flowering stage. If HID systems are too strong for your plants or would create too much heat, this may be ideal. They have an output colour temperature of 2700k which makes it great for the flowering phase. They are suitable for use as the main light source in small set ups or as a supplementary light. By hanging it vertically between plants, you supply more light to normally shadowy places. Beneath the top leaves, less light gets through, making lower leaves less productive.