Ah, Joe Dirt was right as usual. That is a 10000Kelvin rating. No those lamps would be crap and are just an experiment in my opinion.. HTG sells a lot of crap like that, like garage flood lights with LED bulbs in them that don't do shit but they get 50-60 dollars off the unsuspecting customer.
For your first grow, go with what's proven, spend the same amount on the 3000k lights. That number you're seeing is just the color of light nothing to do with the power. Also, make sure you realize they're just bulbs - there's no fixtures since you're in a rush to do this. So make sure you have T5 fixtures.
Here's directly from HTGsupply (where that came from I'm sure)
One Single TWO FOOT 24 watt F24HO HIGH OUTPUT T5 FLUORESCENT LAMP
10,000K SUPER DAYLIGHT- GROW SPECTRUM
For use with all High Output 2' T5 systems!
This is an AGROMAX Brand Premium High Output T5 Fluorescent bulb - the best on the market!
High Output = 2,000 lumens!
2 feet long 24 watts
One year warranty on bulb.
Perfect for T5 Grow Light systems!