Bright idea for dimmed lighting: To make the most of your lighting install the highest-wattage lightbulb possible then dim it down to accommodate the mood and lighting needs. Consider putting dimmers on both overhead lighting and lamp lighting.
All-around lighting includes general lighting and natural light. You want to ensure that at any time of day there is enough light for everyone to effectively use the space without incident and that any dark areas are minimized.
Candles also offer wonderful sparkle and set a distinctly relaxing romantic tone. Just make sure you keep them well away from any flammable objects such as towels and hair and never leave them unattended.