ADA Aquasky 361 is the 36cm length LED - at least the acrylic stand is 36cm but this is the same LED unit from the Aquasky 301 (30cm unite) so not sure why you would choose this for your tank
ADA Aquasky 451 is the 45cm light unit
I like the frosted acrylic aspect of the "moon" Aquasky but it's also brighter & would hesitate to run this non-factory-dimmable LED without CO2
Chihiros - cost efficient, variable build quality, dimmer available
Twinstar - I suggest you consider this LED series, not sure if few retails shops carry the 45S or if the S series is only available in 60 & 90cm, dimmer available
There may be some new LEDs coming onto market after Interzoo
Even with CO2 addition you can still run a fairly "slow" tank