hyggar 957 is probably fine for your needs. It would be around $60 in usa (but buy it soon as price might double with tariff); it is a pain to program but it works - i have one on my 20 long.
My goto light used to be fluval plant 3.0 but it will be 4x at $210; these days i prefer ai blade but they 36 inch is not their sweet spot and they are a few dollars more than the plant 3.0.
Honestly i would use the hygger or one of the similar lights in the $60-$80 range for at least a few years until you have a need for something more expensive.
https://amazon.com/Aquarium-Extendable-Dimmable-Spectrum-Freshwater/dp/B077YWKZ1D/
hygger has different models and mostly have to do with power and pain to program.
The
chihiros b mentioned above can be found here:
Chihiros B Series LED Light - Chihiros Aquatic Studio
You would need the 90cm model which is 36 inch. I've not used that model so no comment (i've used their wrgb series - they require a smart phone to program)
I haven't used the b series so i won't comment on them first hand. I don't love the hygger but it is very inexpensive; the spectrum is fine and once programmed it remembers the program; i just have to reset the time on
power outage. I've only had it 1.5 years so can't comment on durability but it is ip97 (splash proof).
Most of these inexpensive devices have a weakness in the power supply which are usually cheap to replace but i've not tested this comment.
For the plant 3.0 i have several that are 5 year old and i've had them fall into the tank on occasion and they keep on ticking.
The ai blade i mentioned above is a newer device and my oldest is 2 years old.
I do have a 4 year old cichiros wrgb 2 and that is a product i do not recommend due to the visible spectrum (they have improved with the pro ii which adds a more neutral look with white leds and the b model is probably pretty good i just haven't used it so no first hand comment).
I'm not trying to push these devices i'm just commenting on the models i've used.
I picked up a b45 (for 10 gallon aquarium) for fun and in a month or so i will be able to comment on it BUT i would not wait that long to buy a light - as there might be a very serious price increase soon.
I did check the B model reviews and it seems ok; just a little more expensive than the hygger. The only light i know that does not require manual reset of the time on power outage is the ai blade but that is a much more expensive model.