Can I get away with putting a 14W bulb into a 13W lamp?
It is never a good idea to exceed the ratings on a fixture. They are UL listed, in the USA, for the rating specified and that listing goes out the window when exceeded. The stickers I'm familiar with usually read something similar to: &quot; WARNING! Do not exceed the listed rating&quot;.
The ratings for LED fixtures are more critical because of the electronics in the fixtures. There are transformers, rectifiers, capacitors, etc.,that are very sensitive to overloads. Subjecting the components to an 8% overload could blow them out or greatly reduce their life expectancy. Do yourself a favor and get the right bulb.