Honestly even the 4 year old Mars stuff works fine, I started with HPS and had fantastic results.... Too much in fact believe it or not but I always struggled with heat in peak summer. Swapped to the Mars LED and yeilded less admittedly but pulled a shit load less power and zero heat problems. I now run a mix of the 2 depending on time of year. I would like to have some modern LED panels but unless something is miles ahead of the rest I'm not really sure where next?