All I can say is DIY LED KITS. These are extremely easy to build and you can usually build one for the same if not less than a MH structure. There are sites that sell 24" led kits with 48 LEDs. With that structure you can cover about 36" long by 24" wide with it about a foot above the tank. Youtube has builds that walk you through every step in great detail. All you need is basic soldering experience.
If you need direction to a good one I can send you a link. But LEDs allow you to do so much, including create thunderstorms, moon phases, lighting effects, sunrise/sunset, clouds ect. when hooked to a Controller. With a 150 you can probably run 2 24" heatsinks with LEDs and be plenty. You also are able to add red LEDs for another spectrum. The jury is still out on red LEDs but you will always have that ability to add them later.
The best part is they last approx 11 yrs. and even they they still work just lose about 1/4 of there power. Compare the cost of yearly bulbs and the initial fixture and LEDs win by a longshot.
