Recently went for a warrant of fitness for my bike The inspector was not happy with my front turn indicator lights
He thought there was not enough contrast in the flashing
The lamp should be off and on not running light on and then indicator light coming on as well when it flashes
He gave me the warrant with some reluctance and commented that he personally would not be happy with it.
I can see his point What do others think?

I don't even have front indicators on mine as a year round daily driver -- but I do plan to put some LED's, probably on the forks, in the future. I think LED is simply the way to go for lighting, there are a ton of options but most are priced between $100-200.

Actually by law, at least in the US, the front of a vehicle must have a running light. The low/high contrast between running light and flasher should be 1:5, but many cheap amazon LED bulbs do not have that, so stick with regular incandescent bulbs, or get a proper LED flasher.

Another option are "switchback bulbs" that do not have a difference in contrast, but they are white as running light and switch to amber for flasher.