Recessed lighting is a light fixture that is installed into a hollow opening in a ceiling. The common sizes are 4, 5, and 6 inches in diameter for indoor or outdoor. Depending to recessed light's type they can provide ambient, accent, task, wall wash, and graze lighting effects.

If you are installing lights in a ceiling with insulation, you may need special IC-rated (insulation contact) recessed lights. Use LED recessed lights for energy efficiency and long lifespan.

By Housing Type

New Construction Housing: Installed in new homes or major renovations before the ceiling is closed.
Remodel Housing: Designed for existing ceilings; can be inserted through a hole in drywall.
IC Rated Housing: Insulation Contact rated; safe for direct contact with insulation.
Non-IC Rated Housing: Requires a clearance of at least 3 inches from insulation to prevent overheating.
Airtight (AT) Housing: Sealed to prevent air leakage, improving energy efficiency.

By Trim Type

Baffle Trim: Features ridges that reduce glare; ideal for living rooms and bedrooms.
Reflector Trim: Features ridges that reduce glare; ideal for living rooms and bedrooms.
Gimbal Trim: Adjustable, allowing you to direct light where needed.
Eyeball Trim: ISimilar to gimbal but with a more pronounced directional control.
Wall Wash Trim: Designed to spread light evenly on walls, highlighting art or textures.
Shower Trim: Water-resistant and sealed, perfect for bathrooms and outdoor use.

By Light Source

LED: Energy-efficient, long lifespan, and available in various color temperatures.
Incandescent: Traditional but less energy-efficient; becoming less common.
Halogen: Brighter and more efficient than incandescent but generates heat.
Fluorescent: Energy-saving but less common than LED.

By Voltage Type

Line Voltage (120V): Connects directly to household voltage; easier to install.
Low Voltage (12V/24V): Requires a transformer; provides a more focused and controlled light.