If you are replacing a SYLVANIA RT4 3000K downlight, start with the item number printed on the existing unit. “RT4” identifies a four-inch retrofit family, and “3000K” describes its nominal light color. Those two details do not establish the output, reflector, dimensions, connector or dimmer requirements of the replacement.
For the familiar fixed-color, 9-watt, 600-lumen version, the key number is 74286. Other RT4 products can also provide 3000K light, including selectable-color versions, but they deserve a separate compatibility check. This guide helps you identify the correct category before buying a single replacement or updating a whole room.
Identify the exact RT4 variant
74286: fixed 3000K, 600 lumens
SYLVANIA’s manufacturer-authored ULTRA RT4 bulletin lists item 74286 as LED/RT4/600/930/FL80: a four-inch, 9-watt, 600-lumen, 3000K unit with 90 CRI and 120-volt input. Current family literature shortens the ordering abbreviation to LED/RT4/600/930. This is a fixed-color product, so do not expect a color-temperature selection switch.
The item number is more dependable than a seller’s “warm white” title or a shared product photo. Ask for a photograph of the box label and the unit label when buying older inventory. Also confirm how many complete downlights the listing includes; a catalog’s case quantity is not necessarily the retail pack quantity.
Other documented RT4 choices
The LEDVANCE Hi-PerformanceLED RT specification sheet separates these alternatives:
- 40625: LED/RT4/675/930/G2/CEC, a fixed-3000K baffle version rated at 8 watts, 675 lumens and 92 CRI.
- 62014: LEDRT49SC3650SM, an 8-watt, 650-lumen smooth-reflector model with five selectable color temperatures.
- 62009: LEDRT49SC3650BA, an 8-watt, 650-lumen baffle-reflector model with the same five color choices.
The selectable models offer 2700K, 3000K, 3500K, 4000K and 5000K. Selectable does not mean automatically matching the neighboring lights: the chosen setting, output and reflector all matter.
Check the ending of the ordering code carefully. In this fixed-color family, 74288 is the 4000K version, while 74289 is 5000K. Item 74291 belongs to the larger RT5/6 family despite also being 3000K. Neither a color match alone nor an RT name makes a product a four-inch replacement.
Measure the housing, not just the visible trim
“Four-inch” is a nominal housing category. The white trim overlaps the ceiling opening, so measuring its outside edge does not identify the can size. Find the housing’s manufacturer and model label, then check the opening, internal clearance, socket position and mounting arrangement against the instructions for the replacement.
Dimensions have changed across generations. The current Hi-PerformanceLED sheet gives the RT4/600/9XX assembly a 5.51-inch outside diameter and 2.64-inch height. The older ULTRA RT4 sheet illustrates a 5.04-inch diameter and approximately 3.18-inch height. Do not choose whichever drawing is more convenient: obtain the documentation for the actual unit being supplied.
Ask your installer to verify these points:
- The existing housing has the construction and clearances the kit requires.
- The retention clips or other mounting hardware can securely hold that exact retrofit.
- The trim will cover the opening without relying on improvised spacers or adhesive.
- The socket, adapter and wiring fit without being crushed or contacting sharp metal edges.
- The housing’s insulation-contact and other installation restrictions remain satisfied.
Do not assume an LED retrofit changes a non-IC housing into an insulation-contact-rated assembly. Lower power consumption does not by itself authorize changing the original housing’s installation conditions. Likewise, a canless wafer with a remote driver box is a different product type, even if the front looks similar.
Check the socket and connector together
The fixed 74286 family is documented with an E26 medium-base adapter. An adapter that screws into the existing socket addresses one part of compatibility; it does not establish that a connector left behind by a different retrofit is electrically interchangeable.
The RT4 ValueLED instructions linked from LEDVANCE’s family page illustrate a socket adapter and mating connector. They also warn that installation requires knowledge of luminaire electrical systems and must use suitable housing construction and dimensions. This is a related-model instruction sheet, so use it as a reminder to obtain the exact kit’s instructions, not as proof that every RT4 uses identical hardware.
Use the supplied or explicitly approved adapter and connector combination. Do not cut plugs off, force mismatched connectors together or borrow an old driver simply because the wires look familiar. GU24 sockets, compact-fluorescent housings with ballasts and hardwired commercial downlights require their own documented solutions. A 120-volt screw-base RT4 is not automatically a replacement for those systems.
Turn power off at the circuit breaker before any inspection that exposes electrical parts. If you cannot identify the housing or safely access its label, have a qualified electrician do it. Damaged sockets, brittle insulation, overheating marks or loose wiring need evaluation before a new light is fitted.
Match the dimmer to the exact downlight
“Dimmable” does not mean compatible with every wall control. The Hi-PerformanceLED family specifies dimming to 10% with compatible dimmers, rather than promising dim-to-off behavior on any circuit. Identify the dimmer’s exact model and the number of lights it controls before ordering replacements.
Lutron’s minimum-and-maximum-load guidance explains why LED compatibility is specific to the lamp and control combination. An incandescent wattage rating cannot simply be divided by the new LED’s wattage to establish a safe fixture count. Too little compatible load can contribute to flicker, ghosting, reduced range or erratic operation.
Newer LEDVANCE screw-base models have their own documentation. For example, item 62859, RT41A600ST930SMWHE26, is a fixed-3000K smooth-reflector option rated at 7 watts and 600 lumens. Its family sheet names controls including Lutron DVCL-153P and Leviton 6674. That list applies to the documented RT1A family; it is not evidence that those controls have been verified for every older 74286 installation.
If retaining an existing dimmer is important, obtain an exact match from the manufacturer or its support team. For a room upgrade, have the installer test the intended fixture count through the usable dimming range. Persistent flicker or buzzing warrants diagnosis rather than accepting it as normal LED behavior.
Read wet and damp ratings narrowly
The current Hi-PerformanceLED sheet lists suitability for indoor dry, damp and wet locations. Older ULTRA RT4 literature uses broader indoor-and-outdoor wording. That difference is a reason to check the supplied model’s label and instructions before choosing a shower, porch or other exposed location.
A damp-location marking should not be treated as wet-location approval. A wet-rated trim also does not prove that every existing housing, wiring arrangement or mounting location is suitable. Ask the electrician to evaluate the complete installation, including the kit’s specified seals or gaskets and any restrictions for the location.
For an outdoor replacement, get explicit manufacturer confirmation for that exact product rather than extrapolating from an older brochure or a seller’s “waterproof” headline. Do the same if the installation has unusual temperatures or an enclosed arrangement not clearly covered by the documentation.
Choose for a consistent room, not just a matching label
For one failed light, matching the exact item and generation is the best starting point. Even then, compare the replacement in the room before buying extras. If an exact replacement is unavailable, consider whether changing all fixtures in the same visible group will give a more consistent result than mixing reflector styles and outputs.
For a whole-room refresh, decide on color, output and appearance together. A smooth reflector and a baffle can look different when switched off as well as when illuminated. Compare the actual trim against the ceiling and view a sample from normal seating positions. This is especially worthwhile when adjacent rooms remain on existing lighting.
Before placing the order
Save the existing item number, housing model and dimmer model, plus photographs of their labels. Then confirm the replacement’s full ordering code, voltage, output, fixed or selectable color, location rating, included adapter and pack quantity. Use the official RT family resource page to locate supporting documents or ask the manufacturer to resolve an uncertain pairing.
Choose 74286 when you need that documented fixed-3000K variant and its actual hardware fits your installation. Choose a different RT4 only after repeating the compatibility checks. A verified label and a suitable housing are more valuable than a listing that merely says “four-inch replacement.”
