I have 2 48" t8 4700 and 2 t8 -18" 2700 \nand 1 of below....closet , 1 plant to start maybe 4 tops... NRG® 312LU FEATURES New higher output plus increased lumens per watt 5000K high CRI LEDs provide optimal color recognition 18w – 1120 lumens – 63 LPW, saves energy Five times the rated life of CFL Universal voltage – 120-277V (120V on photo-controlled version) Non-cutoff refractor fills surrounding area with safety/security illumination 1/2†bottom knockout for surface conduit wiring Vandal proof construction Rigid cast aluminum back housing One-piece polycarbonate front Tamper proof hardware included Dark bronze architectural finish Listed to UL1598 for use in wet locations Five year limited warranty CERTIFICATIONS UL Wet listed
The will "sustain life" durring veg.. When you start thinking about budding they won't really be enough.