LL27 Series — Long Life Electronic Photocontrol
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.
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
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 Black BU Blue GN Green YE Yellow GY 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) |
Technical Resources
Datasheets & Documentation
Download specifications, wiring diagrams, installation guides, and compliance documentation for NiteControl products.
Datasheet
LL27 Series Long Life Electronic Photocontrol
Full specifications, ordering information, operating characteristics, dimensions, and regulatory listings for the LL27 Series.
105–305V NEMA Twist-Lock ANSI C136.10
Download PDF
Wiring Diagram
LL27 Wiring & Installation Configurations
Illustrated wiring diagrams for three-terminal locking plug, single-phase, and shorting cap bypass installations.
LL27 Series
Download PDF
Installation Guide
Field Installation & Troubleshooting Manual
Step-by-step mounting, lux set point adjustment, failure mode selection, and field service guidance for all LL27 variants.
LL27 Series
Download PDF
Compliance
ANSI C136.10 & RoHS Certification Letters
Official compliance documentation for municipal procurement, utility bid packages, and RoHS certification records.
ANSI C136.10 RoHS ISO Facility
Download PDF
Contact & Quotes
Get in Touch
Request a quote, ask a technical question, or connect with our team. We respond within one business day.
Headquarters
NiteControl
Phone
Mon–Fri, 8:00-5:00 EST
Email
Stock & Lead Times
Contact us for current availability and lead times on LL27 Series orders.
Request a Quote or Information
✓ Message received! A member of our team will follow up within one business day.