Hi,

Well, you should have a look at both spectrums of the 2 bulbs and see which one is closest to flowering spectrum of the sun. Those spectrum schemes are sometimes on the bulb boxes or in the manuals. Personally, i always go Hortilux but i didnt read and check Solar NRG yet. My Hortilux bulb is 145 000 lumens and kicks ass in the red spectrum. Its up to ya mate, choose whatever suits you best

Have a good Smoke! :smokin: