Looks nice but light bulbs are used in thousands of logos. I have 2 clients with light bulb logos. So it's hard to come up with anything unique.

A quick Google for "Light Bulb Logo" produces some that are similar, but I didn't see an exact match. But it's probably out there somewhere.

Yes, this exists many times over. I've done something similar for an older project -

Yes, there are thousands of light bulb logos, but I think your symbol has enough potential to outshine – no pun intended – most of them. The brush stroke feels natural and pulls it away from other competitors. If anything, have another look at the weight distribution in the bulb.

Sometimes an excellent execution is all it takes.