This is a great light kit at £250 complete with Daylight Dual spec lamp. With Red spec lamp included £300. Rivals a 600w dual spec well. Great when used with 600w HPS dual spec in larger spaces to boost lumens and spectrum. Good alternative to LED. Lower heat output than a 600w hps. Now with improved ballast!
Warning! There are now cheap replica of this item out on sale. Most are not up to the standard of the philips. Maxigrow have brought out a similar lamp with different frequencies too. be sure you to get philips or maxigrow lamps.