Is that the right link? That link shows a
quad fixture rather than a dual (unless I missed something).
How are the reflectors (i.e. what kind or type) on that unit (dual or quad)?
The Sunblaster type (including clones) are a good fixture, but IDK if the reflector problem has been fixed at the factory level, or if the correction has worked its way through the supply chain.
A PROBLEM WITH SOME T5-HO REFLECTORS – January 2020 onwards
General note for the uninitiated:
Reflectors can increase (up to almost 100%) the output intensity of T5 bulbs, which can affect the bulb to basking site distance. They're good bulbs with or without reflectors, it's just good to know what you're working with (if you
don't have a UV meter) to get that distance right.