Are they the bulbs with the pin end?
What I ended up buying off Amazon was a set of two screw in type photography bulbs,
works in common light sockets, 105 watt CFLS for 18.00 for the set of 2 + postage,
They are the 6500K (daylight) bulbs, 22800 lumens between the 2 bulbs.
Huge too! 12" long and 6" wide, 1.5 lbs each! works great in a clamp on type spotlight fixture.
And, it beats stringing up 10 to 12 of the 26 watts 6500K CFLS,
I was using to equal the same amount of light.
My little trees love them!