All of my larger Nepenthes are grown in full sun. Some are on tables and others are in hanging baskets. Once my Nepenthes get to about 10" in diameter and are well acclimated, full sunlight isn't an issue. My smaller Nepenthes get some diffused lighting from my shade cloth. I used to use 50% shade cloth but found that it cut down too much of the sunlight for me. So I grow them now under partial shade cloth that allows direct sunlight to come through but also offers zones of diffused light. This helps with acclimatizing new arrivals that aren't quite ready to receive full sun. Most Nepenthes do like a lot of sunlight and growing them in shaded locations can have adverse effects.
New arrivals that I grow outdoors do experience a transitioning period with increased light levels. I've noticed that new Nepenthes are generally a darker green than my indoor grown plants or what I buy. Higher light levels outdoors do cause the leaves to lighten up or "yellow" a bit. Red spots on the leaves or edges will be visible as the plant is adjusting to its new environment. As the plant settles in, a healthy Nepenthes will have nice new growth and look "vigorous."
On occasion and poor planning on my part, I'll put a new arrival outdoors and it will receive too much sun and leaf damage will occur. Leaves will get bleach spots or brown up on the edges. The direct sun and decreased humidity outdoors are the culprits. Pitchers wither, turn brown, and die. Depending on the size of the plant, I'll move it to a shadier location. I've decreased the exposure to direct sun by hiding them between larger Nepenthes or placing them in an area that gets morning sunlight as opposed to afternoon sunlight that can be stronger. Other times I've left bigger, robust Nepenthes to adapt where they are. Lower leaves may bleach out and die over time, but the new growth will be green and the leaves sturdier.
One other note about light. After speaking with some other growers, they commented on flowering Nepenthes. They suggested that growing outdoors and increased lighting may have something to do with inducing flowering in some Nepenthes. Since I grow outdoors in the northern hemisphere my photo periods are not the same as the tropics or under lights with timers. Spring and fall seems to be when my outdoor Nepenthes flower the most. Temperature may also play a role in this as well. Plants do flower when temperatures rise and sunlight increases as it does in spring. Multiple plants of the same species and hybrids tend to flower at the same time as well providing they are of about the same size. This is just an observation and is by no means to be taken as scientific data.
Light is one element to healthy Nepenthes growing. Poor lighting results in poor Nepenthes health. Nepenthes grown under artificial light like in terrariums or grow chambers produce some of the most spectacular pitchers I've seen. I used to grow my first Nepenthes under grow lights with great results. You can also supplement indoor Nepenthes with lights on a grow rack if desired as well. The information I provide is from my experience growing my Nepenthes in an atypical environment outdoors. My Nepenthes experience cosmetic damage as a result of growing outdoors and some die due in part to lighting issues that I cannot control. But overall, Nepenthes are resilient plants and will do well in a variety of environments with a little experimentation.