If I were you.....
I'd look up the addresses for all the brands of lights you like. Most of them have web sites with contact information. It's up to you to call or write each one, explaining your desire to sell in some specific area (it sounds like Canada is your target) and asking that a representative contact you.
You'll have to research the import (and probably export) rules for your country. In the US a business license is usually required.
There are several areas that tend to cause problems at young businesses. Among them are:
1) understanding the tax rules for your location and following them.
2) Failing to realize the cost of building up inventory
3) underestimating the amount of work and time that goes into A)record keeping, B) shipping and receiving, C) accounting, D) idle customer inquiries.
4) failing to set aside enough cash reserve to get through the first year when profits and low to nothing.
Promoting an internet business is, well, strange. CPF has banner ads that you can buy into. There are various specialty oriented magazines you can advertise in. You will, of course, want to make sure that you supply your web site's URL to all the major search engine.
It really helps if you have some unique hook. You could, for example, commission a special light by Mr Bulk or McGizmo.
Good luck. Keep in mind that 4 out of 5 businesses fail in the first 2 years.
Daniel