I only wear my lycra shorts and cleats on weekends and bike meets. Only 3 of my weekend bikes have spd pedals.
When I commute, I'll wear jeans or cargo pants, t-shirt, pull-over hoodie or windbreaker. For the summer I bought a bunch of t-shirts and cheap cargo shorts from walmart to ride to work in. I bring my work clothes in my panniers. My commuter bikes all have either power-grips or those bear trap pedals.
So far I'm able to keep the bike in the office so removing the lights is not an issue. If I ever have to lock the bike outside, I'll just make sure that the lights come with me and I'll lock up next to the employee's motorcycles. Nobody messes with the hogs! That's where I locked the bike before, until I started sneaking the bike in...Well not sneaking it in, just sorta bringing it in as soon as we got a new manager.
Ernest