![]() ![]() #Larger than light lighting update#That said, if your existing incandescent lights measure 5-inches and you want to update to LED, you’re in luck. Of the three most common sizes of can lights, 5-inch is the least used. The standard ceiling cut-out size for 4-inch housings is 4-3/8 inches, and the inside diameter of the housing with the trim removed measures approximately 4-inches. ![]() This specification is known as lumens per watt (lm/W), and is one of the deciding factors in determining if a luminaire meets building code requirements for energy efficiency.Ĥ-inch recessed lights are often used for accent and task lighting, but they are becoming more popular for general lighting as well. The efficiency of a recessed light is measured by how much power it consumes in relation to how much light it produces. Non-IC incandescent housings can be rated as high as 150 watts, but they are not for use in ceilings with insulation. IC Rated incandescent housings are usually rated for 75 watts maximum, which means you cannot safely use a bulb larger than that. When power calculations are being made on an lighting plan, the fixture’s maximum wattage rating is used. Recessed lights can be measured by their wattage rating. If there’s an attic space above the ceiling then standard housings can be used regardless of the size of the ceiling joists.Ĥ-inch Housings – Standard 4-inch housings are 5-1/2 inches tall, and shallow housings are 3-1/2 inches tall.ĥ-inch and 6-inch Housings – Standard 5-inch and 6-inch housings are 7-1/2 inches tall, and shallow housings measure 5-1/2 inches tall. This is true for both remodel housings and new-construction housings.Ĭommon practice is to use standard housings unless they are taller than the ceiling joists, in which case a shallow housings would be needed. The metal “cans” come in two heights – standard and shallow. Recessed light housings are measured by their height as well. ![]()
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