If you have seen an "E1L" part number on an Elco Lighting quote or spec sheet, it belongs to the Oak system, Elco's 1-inch miniature LED downlight line. This post decodes the Oak part-number system and lays out the specs that actually change between styles and finishes, so you can read an Oak SKU and know exactly what you are getting.
What the Oak system is
Oak is Elco's smallest recessed platform, built around a seven-eighths-inch inner aperture. It targets applications where a standard 4" or 6" can will not fit, such as shallow ceilings, tight remodel cavities, and display or accent lighting in cabinetry and coves. Because it is a small-aperture design, Oak runs on 12V AC rather than line voltage, and each fixture needs a companion transformer.
Decoding the E1L part number
Elco's Oak catalog builds each SKU from four segments: base code, beam angle, color temperature, and finish.
Base and style code:
-
E1L02: 1" round downlight (fixed) -
E1L12: 1" square downlight (fixed) -
E1L32: 1" round adjustable (30° gimbal, "pull-down") -
E1L22: 1" square adjustable (30° gimbal, "pull-down") -
E1L61: 1" round trimless downlight
Beam angle code:
- (blank) = 38° standard
-
Nprefix = 28° narrow -
Wprefix = 50° wide
Color temperature code:
-
27= 2700K,30= 3000K,35= 3500K,40= 4000K,SD= Sunset (dims from 3000K to 1800K)
Finish code (suffix):
-
W= All White,B= Black with white trim ring,BZ= All Bronze,H= Haze with white trim ring,BB= All Black
Example: E1L02F30W reads as a 1" round downlight, standard 38° beam, 3000K, all white.
Specs by style
Per Elco's Oak catalog, all figures below are rated at 6W to 6.4W input power.
- Round/square downlight (E1L02/E1L12): 450 to 675 lm (varies 2700K to Sunset), 93+ CRI, UL Listed wet location
- Round/square adjustable (E1L32/E1L22): 625 to 700 lm (2700K to 4000K), 93+ CRI, UL Listed damp location
- Round trimless (E1L61): 450 to 675 lm (varies 2700K to Sunset), 93+ CRI, UL Listed wet location
All Oak styles are IC rated for direct contact with insulation, Title 24 JA8-2016-E compliant, ENERGY STAR Listed, and carry a 50,000-hour L70 life span with a 5-year warranty.
Transformer requirements
Because Oak is a 12V AC system, every fixture needs power from a compatible transformer. Elco offers three families: the E1LDRV60 (fits through the ceiling hole, ELV dimmable, 60W, daisy-chains up to 6 fixtures), the LET-60 series (remote-mount, ELV or 0-10V dimmable depending on model), and the ETR12/ETR12-20 magnetic transformers (MLV dimmable). Dimming compatibility (ELV vs. MLV vs. 0-10V) depends entirely on which transformer you pair with the fixture, so confirm the transformer model before specifying a dimmer.
New-construction framing
Downlights (E1L02/E1L12) use the E1LF1 frame; adjustables and the trimless downlight use the E1LF2 frame. Both frames are available in multi-fixture "M" configurations (M2 through M5) for row mounting. Remodel installations do not require a frame.
Rock Lighting stocks the Elco Oak line alongside the rest of Elco's Koto and Pex recessed lighting systems. For the broader comparison across Elco's recessed platforms, see our Elco Lighting recessed downlights buying guide.
Frequently asked questions
What does the "E1L" prefix mean on an Elco part number?
E1L identifies the Oak system, Elco's 1-inch miniature LED downlight platform. The digits and letters that follow encode the fixture style, beam angle, color temperature, and finish.
Can Oak fixtures be dimmed?
Yes, but the dimming type depends on the transformer. Oak fixtures are dimmable ELV or MLV depending on which Elco transformer (E1LDRV60, LET-60 series, or ETR12) powers the run; the LET-60DX series supports 0-10V dimming.
How many Oak fixtures can run off one transformer?
Up to 6 Oak fixtures can be daisy-chained to a single compatible transformer (E1LDRV60, LET-60 series, or ETR12, per each transformer's own daisy-chain rating).
What is the difference between E1L02 and E1L32?
E1L02 is a fixed round downlight. E1L32 is the round adjustable version with 30° of gimbal movement, sold as a "pull-down" style, and it is rated for damp rather than wet locations.
Is the Oak system rated for outdoor use?
The E1L02, E1L12, and E1L61 downlight styles are UL Listed for wet location use, which covers most outdoor soffit and covered-patio applications. The E1L32/E1L22 adjustable styles are rated for damp location only. Confirm the exact SKU's rating before an outdoor install.
Does Rock Lighting carry Elco Oak system parts and transformers?
Yes. Rock Lighting stocks Elco's Oak downlights, frames, and transformer options. Browse the Elco Lighting collection or contact us to confirm stock on a specific SKU.
Need help matching a transformer to an Oak fixture run, or pricing a full package? Request a quote, contact us, or register for a contractor account.
This guide is general information. Specifications and part-number codes are sourced from ELCO Lighting's Oak system catalog and may change without notice; confirm current figures against the manufacturer spec sheet or your quote before final purchase.