Probably, but I don't think its ideal. Otherwise everyone would be going to home depo and picking up cheap pendants. I am currently switching over to MH from PC's. I am going to be using a 70 watt over a twenty gallon. With the PC's I had better results with the 6500K bulbs compared to the 10000K bulbs. I am worried about the way the 6500K bulbs will look, color temp wise.4200k philips mh in very low cost - will that work?