newbie here

Hello, I started a plant from a seed and it is now 3 weeks old. I have it under 150 watt bulb. My plant is stretching out and leaves are very small. I placed it 3-4in under the light but still not growing very fast. What can I do to make my plant grow bushy?

Pics? What type of bulb? If it's a CFL is it 150w equivalent or actual?

yea what kind of bulb? how close is to your plant if its not close enough your plant will stretch closer to the light