English ivy can thrive in various locations with various levels of sunlight. They generally tolerate both low and medium light but also thrive in bright light (but no direct sunlight!). The general rule of thumb for variegated houseplants is that they need more light than their non-variegated, green friends. That said, it is best to keep your variegated English ivy in a bright location. If the location is not bright enough, the leaves of your variegated Hedera helix will likely turn all green.