No, you just basically increase the intensity until it looks right. But I did look this up for you:

In simple terms, Lumens (denoted by lm) are a measure of the total amount of visible light (to the human eye) from a lamp or light source. The higher the lumen rating the “brighter” the lamp will appear. We have all bought 50W or 60W conventional bulbs or spotlights in the past expecting a certain level of brightness.

What this basically means, is that brilliance is based on what's visible to the human eye. Wattage is the amount of energy it takes to produce a certain amount of lumens. And even that depends on what kind of bulb you're using, and the wiring in your house, etc.