I’m using the Fibaro Dimmer 2, although I’m pretty sure the same stands for the Dimmer 1 as well. My advice would be to use momentary/retractive switches if you can, as these are way more intuitive than toggles for dimming and everyday use.
Also, I would get the Dimmer 2s and try them out with your LEDs without addressing the wattage issue. It may be that you need a Bypass 2 to address the low wattage, but I’ve heard stories of others not needing the bypass for very low wattage setups.
This is a great thread for UK options, here I talk about the switches I’m using: