Light bulb question

Whats the difference?

Spiral Compact Fluorescent Light Bulb
Medium Base, 24 Watts, 120 Volts, 1500 Lumens
Long Life 10,000 Hours, 6500K Daylight Color Tone
5.70" Maximum Overall Length

Spiral Compact Fluorescent Light Bulb
Medium Base, 20 Watts, 120 Volts, 1250 Lumens
Long Life 10,000 Hours, 6500K Daylight Color Tone
5.60" Maximum Overall Length

Thanks.

Not much! :D Go for the one with more lumens.
John, would you mind getting all the info you need off that fertilizer thread and letting me know so I can delete it and fix your rep that idiot messed up?

You can delete that thread.