Dusk to Dawn.
Reliably.

NiteControl's LL27 Series delivers long-life photocell performance for LED luminaires — 105 to 305 VAC, 60Hz, with a 20-year warranty and superior surge protection built in.

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20 yr

Warranty

IP-65

Ingress Protection

-40°C

to +70°C Ambient

81,000+

On/Off Cycles Rated

ANSI C136.10 · ROHS · ISO

Certified & Compliant

Applications

LED Luminaires Dusk-to-Dawn Control CFL & Induction Ballasts Electronic HID Drivers Solid-State Drivers

LL27 Series

Technical Specifications

Full electrical, mechanical, and regulatory data for the LL27 Series Long Life Electronic Photocontrol.

Operating Characteristics

Voltage Range	105 to 305 VAC, 60Hz
Load Rating	1800VA driver or ballast load, 8A
Inrush	Up to 200A (per ANSI C136.10)
Ambient Temp	-40°C to +70°C
Turn-ON Level	ANSI Standard 1.5 ± 0.3 fc (other options available)
Turn-OFF Level	1.5× the Turn ON level
Turn-OFF Delay	2–5 seconds
Switch Life	>81,000 On/Off operations at rated load
Dielectric	5,000 VAC

Features & Construction

Ingress Protection	IP-65
Warranty	20 years
Cover Material	Anti-UV impact resistant polypropylene
Light Sensor	Filtered Silicon — sensitive to sunlight, not LED bleed
Relay	Sealed relay
Surge Protection	2 or 4 MOVs — 860J/20KA or 1720J/40KA
Surge Rating	ANSI C136.10 Extreme (20Kv, 10Ka, 10 pulses)
Switching	Zero-Cross Switching
Gasket Temp	Continuous 105°C, Melt 185°C
Cover Thickness	0.105 inch heavy-wall (black standard; colors optional)

Ordering Information

Model Prefix	NCLL
Voltage Code	27 = 120–277 VAC
Light Level	15 = 1.5 ANSI Standard 10 = 1.0 26 = 2.6 IES
Cover Color	BK BlackBU BlueGN GreenYE YellowGY Gray
Failure Mode	None = Fail ON \| F = Fail OFF
MOV Option	20 = 860J/20KA \| 40 = 1720J/40KA

Regulatory Listings

Standard	ANSI C136.10
RoHS	Compliant
Manufacturing	ISO Certified Facility
Dimensions (H)	2.219 in max (56.4 mm)
Dimensions (W)	1.875 in max (47.6 mm)
Gasket Depth	0.125 in (3.2 mm)
Connector	Three Terminal Locking Type Plug (NEMA twist-lock)