Warm and natural white light full sun spectrum simulates full daylight standard intensity especially suitable for plant aquariums technical specifications performance 15 watts 80 lux life duration average 7500 hours length 43 74 cm t8 light temperature 4200 k performance 20 watts 125 lux life duration average 7500 hours length 58 98 cm t8 light temperature 4200 k performance 30 watts 200 lux life duration average 7500 hours length 89 46 cm t8 light temperature 4200 k p