true HPS grow lamp, not high lumen output sodium lamp. with right lumen, right PAR, right spectrum for hydroponic. ... master : right spectrum, high lumen. that's a real grow light, but high price.Our bulbs: better spectrum than ... international fairs, communicated with many growers and counterparts like Philips, GE, EYE, GAVITA,LIGHTS INTERACTION.etc. Tokyo lightling fairHortiflorEXPHorti FairRussion ...