pro products makes a really nice RHP, you can call them, tell them what cage you are getting, what animal you are keeping and they will spec out the right one for you. I have also heard that they will send the panels directly to AP for you. I only have experience with Helix RHPs they worked great however the appropriate wattage I needed for one of my cages wouldn't fit due to there being a screen drop for a flourescent lamp so I had to go back using a bulb. If I had the choice I would go with a RHP. just my 2 cents