The ReefLED G2s benefit from a completely new chipset in their compact arrays, delivering a richer spectrum, and thanks to their new power management feature, they can be tuned from a 10,000K reef-white to a 23,000K blue running at full intensity, which was not available in the G1. Their signature REEF-SPEC Blue has also been augmented with violet and ultra-violet and boosted to 470nm blue at the top of the spectrum, causing fish and corals to truly shine. The ReefLED G2s are 100% Reef Safe & 100% REEF-SPEC, delivering exceptional coral growth and coloration. Setting the daytime lighting program is now super easy: just set the desired color (8000K-23000K) and intensity for different time periods of the day. In addition, the ReefBeat App now offers 5 colour/intensity presets that can be manually activated, including coral photography, UV look and more. ReefLED G2 Features Stronger REEF-SPEC light output Richer Reef-safe colour range Easier light set-up with one colour scale and one intensity scale Gentle shimmer in your aquarium ReefBeat App for easy set-up, operation, notifications and automated lighting programmes Optional clip on visors for reduced glare Dimensions - 4.7 x 4.7 x 2 in Wattage - 60 PAR at surface - 500 PAR at bottom - 150 (assuming 20" depth)