seedlings need almost no light, as texas grass says, 10 - 25 watts is all that is needed (and thats not 10x25 for a total of 250 watts, that's 10 watts - 25 watts)(what you are using isn't too much, just not needed)

in this case, less really is more as, if you reduce the amount of light now, you can move the bulb much closer which will help minimize seedling stretch

anyway, that's my understanding