JBL Solar Ultra Tropic -for the optimum promotion of plant growth in the Aquarium. The colour temperature of 4000 K is ideal for aquatic plants. Best possible method of inhibiting algae, with full-spectrum light providing ideal conditions for photosythesis. JBL Solar Ultra Tropic guarantees best colour reproduction with 1A colour reproduction index (very good). Plants and fish show themselves in their natural beauty. Individual control of lighting climate possible by combining with JBL Solar Ultra Narur.-16 mm thin diamater-20000 hours lifetime-150% lighting strength, with only 30% more electricity consumption-Please note: these lamps are available in different lenght (also suitable for the Juwel High-Lite lamps), please take care for the right one for your lighting.Available sizes:24 W - 438 mm24 W - 550 mm28 W - 590 mm35 W - 742 mm39 W - 850 mm45 W - 895 mm54 W - 1047 mm54 W - 1150 mm54 W - 1200 mm80 W - 1450 mm