I don't use my blinkies during daylight hours, only after the approach of dusk. However, being seen at all times and at all angles is a must.
It's another subject altogether, but I think 'helping you to be seen by motorists' tools/gadgets have limited capabilities and effectiveness. They don't make up for a lack of skill and a witty survival attitude on the road. The best thing any cycle-commuter can do is be predictable and don't deviate too far from established roadway etiquette, if possible of course, we've all been there. The biggest complaint I hear from people who have 0 knowledge about cycle-commuting (and culture) about cycle-commuters is they are too slow, not going to change, and they are unpredictable, changeable behavior. To be fair, from what I can tell it's mostly beginner errors that trigger this response. I see them all the time, so I believe the criticism. As for the clueless motorists who's only roadway perspective is driving, most people on the road, they need to accept that speed differentials are real and to learn how to pass properly. Don't Fing honk... absolutely unnecessary.
Nothing personal to others, rant over.