>If I were traveling in a spacecraft at or near the speed of light, would that effect my perceptory sense of sight within the spacecraft itself? For example, would the light of a candle within the spacecraft still give me a natural sence of sight within the spacecraft itself?

In an attempt to make things easier to understand imagine that instead of the light waves from your candle being comprised of a very large number of frequencies that there is only one frequency - this would be very similar to laser light (only one color, or frequency present) except that photons from lasers are all in the same quantum state (and it would be all too easy to digress off here into entanglement).

Draw a sine wave on a long piece of paper. The sine wave is the light from the candle (at one end of the paper). Your finger represents the eyes of an observer (at the other end of the paper).

Hold your finger still and move the paper under your finger - ideally you would be able to move the paper at the speed of light. If your finger at one end of paper and the candle at the other end of the paper are not moving relative to each other then the frequency of the light observed at your finger is exactly the same as that at the origin (the candle).

However if either your finger, the candle, or both are moving relative to each other then this will have an effect on the apparent frequency of the light depending upon whether they are moving towards or away from each other. Moving away has the effect of stretching the wave length out (or decreasing the frequency) this is referred to as a red shift. Moving towards each other has the effect of compressing the wave length (or increasing the frequency) this is referred to as a blue shift. The apparent speed of the photons themselves remains unchanged from either perspective (observer or origin).

The presence of a spacecraft around the light source and observer is largely irrelevant.