Halco 81066 MR16WFL35/827/LED MR16 LED 4.5W 2700K 60 Degree Wide Flood GU5.3

Halco ProLED 81066 MR16WFL35/827/LED – 4.5W MR16 LED Lamp | 380 Lumens | 2700K | 60° Wide Flood | GU5.3 | 10–15V

The Halco ProLED 81066 MR16WFL35/827/LED is a 4.5W low-voltage MR16 LED lamp with a GU5.3 bi-pin base, producing 380 lumens at 2700K warm white with 82 CRI and a 60-degree wide flood beam. It is offered by Halco as an energy-efficient, long-life alternative to 35W halogen MR16 lamps in landscape, accent, display, and retail lighting. A wide 10–15V input range helps accommodate both short and long low-voltage wire runs, and the lamp is dimmable to 5% on compatible systems, UL listed for damp locations, and rated for 40,000 hours of useful life.

Wattage 4.5W 35W Halogen Equivalent

Lumens 380 lm 300 CBCP

Color Temp 2700K Warm White

Beam Spread 60° Wide Flood / GU5.3 Base

CRI 82 40,000 Hour Useful Life

Technical Specifications

Brand	Halco Lighting Technologies
Product Family	ProLED MR16 Series
Product Number	81066
Product Code	MR16WFL35/827/LED
Lamp Technology	LED
Bulb Shape	MR16
Base	GU5.3 bi-pin
Nominal Wattage	4.5W
Halogen Equivalent Wattage	35W
Input Voltage	10–15V
Color Temperature	2700K warm white
Color Rendering Index	82 CRI
Luminous Flux	380 lumens
Center Beam Candlepower	300 CBCP
Beam Spread	60° wide flood
Useful Life	40,000 hours (point at which the lamp maintains at least 70% of initial lumens)
Dimming	Dimmable to 5% on compatible dimming systems
Maximum Overall Length (MOL)	1.97 in. / 50 mm
Maximum Diameter	2.00 in. / 51 mm
Location Rating	UL listed for damp locations
Enclosed Fixture Use	Not for use in enclosed fixtures
Landscape Fixture Use	Acceptable in sealed metal landscape fixtures when protected from the elements
Sollos Compatibility	Approved for use in Sollos landscape lighting fixtures
Warranty	5-year commercial/industrial limited warranty based on 10 hours of use per day; 20-year lamp warranty when installed in Sollos fixtures
Package Quantity	1 lamp per package / 10 per inner pack
UPC	807154810666

Product Overview

The ProLED MR16 Series from Halco Lighting Technologies is a line of low-voltage LED reflector lamps built to replace 10W, 20W, 35W, and 50W halogen MR16 lamps. The 81066 occupies the 4.5W position in that line and is rated by the manufacturer as a 35W halogen equivalent. All lamps in the series share a GU5.3 bi-pin base, an 82 CRI rating, a 40,000-hour useful life rating, and a 2.00-inch maximum diameter with a 1.97-inch maximum overall length, so they drop into standard MR16 sockets without changing fixture geometry.

This particular version is configured for 60-degree wide flood distribution at 2700K warm white, delivering 380 lumens with a center beam candlepower of 300. Halco specifies a 10–15V input range for this wattage tier, which is intended to give installers tolerance for voltage drop across longer low-voltage runs rather than forcing a strict 12V feed at the socket. Halco notes energy savings of up to 87% for the series, based on $0.11 per kWh over a 25,000-hour life.

The lamp is dimmable to 5%, though Halco states that it may not be compatible with all dimming systems and that dimming performance varies by system. Magnetic transformers are recommended for dimming applications, and the lamp may not be compatible with all electronic transformers. Halco also notes that these lamps are acceptable for use in sealed metal landscape fixtures when protected from the elements, and that the lamp can be used in Sollos fixtures.

Compatible Applications

• Landscape lighting — path, accent, and specimen fixtures using GU5.3 MR16 sockets
• Accent and display lighting in residential and commercial interiors
• Retail merchandise and showcase lighting
• Replacement for 35W halogen MR16 lamps in existing low-voltage fixtures
• Sollos landscape lighting fixtures
• Sealed metal landscape fixtures where the lamp is protected from the elements
• Systems supplying 10–15V at the lamp, including runs with meaningful voltage drop

Before Ordering – Verify

• Confirm the fixture uses a GU5.3 bi-pin base. GU10 twist-lock and GU4/MR11 bi-pin sockets will not accept this lamp.
• Confirm the supply voltage at the lamp falls within 10–15V. This wattage tier is rated for that range, and other tiers in the ProLED MR16 series use a different range.
• Confirm the beam spread. This lamp is 60° wide flood; the series is also offered in 20° narrow flood, 40° flood, and 60° wide flood versions.
• Confirm the color temperature. This lamp is 2700K; other options in the series include 2700K, 3000K, and on selected wattages 5000K.
• Verify transformer type. Magnetic transformers are recommended for dimming; the lamp may not be compatible with all electronic transformers.
• Verify dimmer compatibility by testing in the actual application before committing to a full installation, since dimming performance varies by system.
• Confirm the fixture is not an enclosed fixture, which is outside the manufacturer’s rated use.
• Confirm the fixture location is dry or damp, not wet, unless the lamp is inside a sealed metal landscape fixture that protects it from the elements.

Safety and Handling Guidelines

• Disconnect power to the fixture or transformer before installing or replacing the lamp.
• Allow the existing lamp to cool before removal, particularly when replacing halogen lamps.
• Handle by the lamp body; avoid applying force to the GU5.3 pins during insertion or removal.
• Seat the pins fully and squarely in the socket to avoid arcing or intermittent operation.
• Do not install in enclosed fixtures, where trapped heat can shorten LED and driver life.
• Do not operate the lamp outside its rated input voltage range.
• Inspect landscape fixture gaskets and lenses so the lamp remains protected from moisture.
• Installation should follow all applicable national and local electrical codes.

Compliance

• UL listed for damp locations
• 82 CRI per the manufacturer’s published ordering information
• Useful life rated to 40,000 hours at 70% lumen maintenance (L70)
• 5-year commercial/industrial limited warranty from date of purchase, based on 10 hours of use per day
• 20-year lamp warranty when the lamp is installed in Sollos fixtures
• Specifications per Halco Lighting Technologies ProLED MR16 Series documentation; all sizes and specifications are subject to change by the manufacturer

Ordering Information

• Halco product number: 81066
• Halco product code: MR16WFL35/827/LED
• UPC: 807154810666
• Packaging: 1 lamp per package, 10 lamps per inner pack
• Series alternatives: 2.5W, 4W, 4.5W, and 8W tiers covering 10W, 20W, 35W, and 50W halogen equivalents
• Case and pallet quantities available for project and contractor orders

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.

5-Year Limited Warranty (commercial/industrial, from date of purchase, based on 10 hours of use per day). 20-Year lamp warranty when installed in Sollos fixtures.