Lighting: FUL vs. LTT/BX

[lectraplayer]

I am working on a couple DIY lighting projects and am wondering which provides a better light for my power input. I'm seeing many hoods now has the inline 4 pin LTT lamps. 2 pin BX lamps are also easy to get for my nano and I'm considering them for my 10g. I'm also finding many square 4 pin FUL (bugzapper type) lamps for sale. Are they just older?

Sent from my ALCATEL ONE TOUCH Fierce using Aquarium Advice mobile app