Equipment
Lighting: I can definitely second the Dinotte rear light, it really is a very powerful light. For the front I use a Lupine Edison which I picked up cheap on eBay last year (horrendous RRP though!)
Panniers: I use Ortlieb back rollers. Bulletproof and cavenous! My previous "Halfords special" fell apart after a few months.
Bell: I use the AirZound which is like a fog horn. Use carefully though, you can give people a real fright with this thing.
Clothing
Base Layer: Merino Wool such as the Howies base layer. Not the cheapest but great quality.
Waterproofs: On most cycling forums you'll hear people tell you it's not possible to wear waterproof gear and not arrive at work wet from the sweat. As an electric biker you'll find this is not the case. I've been using an eVent jacket and trousers in the bad weather and have always arrived at my destination bone dry.
Midlayer/Jacket: Foska Bones jacket. Excellent for visibility and never fails to get noticed, usually by people pointing and laughing - but hey, at least they noticed!
Feet: Diadora Chili Zero's for the shoes. I've changed my pedals to Shimano SPD which the shoes are compatible with.
SealSkinz waterproof socks
Head: Standard cycling helmet. Nike full-face balaclava and 180s ear muffs for the really cold days
Hands: Altura Tempest gloves. Not the warmest so I usually combine with a pair of silk glove liners.
Visibility: Hi-Viz jacket from Halfords which has a neon flashing strip which really works rather well.