If Devotion is dessert, Light Blue is a day at the beach. It launched in 2001 and was composed by Olivier Cresp, the same perfumer behind Devotion, which I find quietly interesting. More than twenty years apart, and both are about a single, very clear picture.

The original Light Blue Eau de Toilette comes with lemon and apple, and it is exactly as crisp as that sounds. The Light Blue Eau de Parfum, with lemon and white florals, is the fuller, rounder version, a little more polished and better for evenings that are still warm.

The rest of this grid is the Pour Homme side, and I would not be shy about borrowing it. The Eau de Toilette with lemon and patchouli is the fresh, easy one. The Eau de Parfum with orange and cedarwood leans woody. Light Blue Capri In Love Pour Homme, with fig and patchouli, is the most unusual of the bunch.

I like Light Blue best for the days when I want no fuss, and I put it on after a shower while my skin is still slightly warm. A citrus like this will not last as long as a vanilla, so reapply mid afternoon and do not take that as a fault. It is also the easiest one on this page to share, since the Pour Homme and the original sit so naturally next to each other on a bathroom shelf, and nobody in the house needs to argue about whose bottle is whose.

The One launched in 2006 and was created by perfumer Christine Nagel, so it is now one of the older members of the house family. That helps explain why it feels so settled. It is a warm, amber-and-vanilla perfume, the one you might wear on a dinner date or under a good coat.

The One Eau de Parfum with amber and vanilla is the classic. The Intense version, with jasmine, is the more floral one, and it is the one I would pick for a dinner where I want to dress up. The One For Men Eau de Parfum, with orange and tobacco, is a warmer, spicier scent, and it is a good match for a cold evening.

K by Dolce&Gabbana is an eau de toilette with lavender, and it sits in a different mood entirely, more herbal. Dolce Eau de Parfum with jasmine is the floral one, the choice for spring afternoons and weddings.

What I would skip: buying a big bottle of a warm, heavy perfume for summer because you liked it in a cold shop. Amber and tobacco feel very different in heat, and a scent that feels right in winter can feel heavy in July. Wear it on your skin for a day first, in the season you plan to use it. Jasmine is the same: lovely in a cool room, sometimes heady in a warm one.

To pick a bottle, start with the mood you want and not the bottle you have seen most. Sweet and dessert-like, go to Devotion, where the Intense versions with hazelnut or orange blossom are the richest. Bright and clean, go to Light Blue, and pick the Pour Homme side if you want something woodier. Warm and grown-up, go to The One, with K or Dolce for a lighter mood.

Spray on your wrist, wait a few minutes, and then walk around. Notes change as the alcohol lifts, and the base is what you will live with by the end of the day. If you like the top but hate the base, or the other way round, keep looking. And if a scent makes your head ache or your skin itch, wash it off and pass.