There is a bit of a problem here.
A little like dry ferts and pressurised CO2, that people are afraid of what they don't know.
There is a way you can utilise the CF you have to be a little better but not unless you can get past your fear of doing something yourself.
If you raise the CF upward away from the tank then it will spread better. Les light in general but more equal spread and will remove the intense hotspot in the centre that is causing you a staghorn headache.
However to raise it up you need to either go open topped and build (yes build) a luminaire to fit it in or....
Hang the light on its own and it will be visible......
Or build a new hood. Much higher than the original, say 1ft deep instead of 3" as it probably is at present.
All 3 options require you to steer past your inhibitions r.e. DIY and just have a go.
A wooden luminaire can be made from 1 sheet of 6mm mdf 2ft x 4ft which will cost you in the region of $10. Wood glue and/or nails would cost you $2-3. Black paint (or your choice of colour) preferably a spray paint like used for car scratch repair would cost you circa $6. It doesn't need to be the ultimate in quality. Its only surrounding a light unit. It isn't a shelf
A deep hood may need a little larger sheet say 6ft x 2ft but the difference in cost is minimal. If it is a hood you don't need to hang it but because it is enclose you do need to yacht varnish the inside due to condensation.
It really is easy and once done provides you options for the future onward. i.e. you can always alter your design, advance the design, fit different lights within it etc.
There are those who 'fear doing' something different and they are stuck with what is available. There are those who 'do' and they can then choose and have exactly what they want.
Her are some ideas for you. The first is a simple hood design which anyone can do and just uses some blocks in the corners as support (I used pine but if I did it again I would use mdf.)
The second is a full on luminaire 'beautified to the umpteenth.
I don't expect you to venture into veneering nor LEDs nor routing. It is the 'shell I am showing you here. It really is easy to do. Both designs are similar in that they have a front panel, rear panel, 2 side panels and a lid. That is 5 pieces of mdf to measure and cut out. (6 if you use the flap design) and then you can just glue and pin it together, then finish it with desired colour, then fit your CF inside.
The first is more a standard 'flap' design where you cut the 'lid' in 2 and therefore have a flap to open and feed etc.
The second is designed as an open top luminaire.
Click on the picture to open the relevant link:
You will get nowhere in life just settling for what is available or what you already know. I didn't have any experience of making things when I built the first hood. You can see how I have gained in confidence since then.
I didn't have any knowledge at all of web design before I started my website but I dived in and learnt on the job. You have to be brave enough to learn things. And learning things makes you want to learn more things. Its a motivational thing. Like I often jokingly add to my posts 'Jonny No 5 - need more data'
AC