Probably not, I have four 26w 6500k and one 23w 2700k for 2 plants in my little veg box, and four 23w 2700k, two 26w 6500k, and one 42w 2700k for 2 flowering plants, cause it's a larger area than my vegging box. So thats 5 lights for 2 plants in veg, and 7 for 2 plants flowering. When the plants in veg get a little bigger, i might add a bulb or 2. Plus i have my lights about 2 inches from the growth tips. I mean, with 4 lights you can probably grow 3-4 plants, but they probably won't be very happy at all. But then again, i've seen people on here grow one plant with one light, they just usually end up stunted. You can certainly START 3-4 plants on 4 lights without any problems, but as they get larger you'll probably want to add more lights. I'm only relaying information that i've read about on here, as this is my first indoor grow, but i've read a LOT and there is some really good information on this site. Just keep reading and find out what works best for you! Good luck, and keep your thumbs green!
P.S.- I got my 6500k lights at Wal-mart...like 7 bucks for a 2-pack