9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
250' Temporary Tunnel String Light - 25 LED Work Lamps - 277V - 12/4 SJTW Cable - L7-20 Twist Lock
Part #: WAL-SL-25-LED-12.4-L7.20
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
Made in the USA
The Larson Electronics WAL-SL-25-LED-12.4-L7.20 Temporary Tunnel LED Lighting String Light System is designed for high output
illumination and daisy chain connections across a total length of 250' away from the power source. The 10 watt LED lamps on this this
work site light set provide more and higher quality light than 100 wattage incandescent lights while creating less heat and using less
power. This LED light stringer operates on 277V AC and provides operators with a temporary work light solution for tunnels and
underpasses up to half a mile in length.
***FREE SHIPPING OFFERS DO NOT APPLY TO THIS STRING LIGHT***
This temporary tunnel string light consists of 25 industrial grade LED lamps with 10' of 12/4 SJTW cable between each unit, stretching a total of
250' in length. This temporary LED string light is connected to a 277V power source via an integrated 5' line-in cable. Each globe light is
equipped with a high output LED bulb which delivers more light output than a 100 watt incandescent. The 10 watt LED bulb draws 10% the
electrical power of a standard 100 watt bulb, making it suitable for standard voltage and low voltage applications. Each LED light screws into a
molded E26 lamp socket and the bulb is enclosed in a bird cage style plastic guard.
Twenty-five high output A19 style LED lamps producing 1050 lumens per lamp provide a total of 26,250 lumens of bright white illumination. Each
lamp housing is constructed from light weight aluminum, and fitted with an impact and shatter resistant polycarbonate diffuser. These LED light
bulbs provide additional safety measures and time savings, given the low heat production and that it does not require replacing for 50,000 hours.
Since the LED bulb uses solid state technology, the vibration (dropping, etc.) that degrades conventional incandescent bulbs is not an issue with
these LED bulbs.
Click Photo to EnlargeClick Photo to EnlargeClick Photo to Enlarge
Each light has a plastic mesh guard enclosure that provides protection for the enclosed bulb and a hook eyelet that allows operators to hang
these tasks lights overhead. Utilizing energy efficient LED lamps, operators are able to provide more light coverage from the same amp draw, or
lower the amp draw using the same amount LED lamps as incandescent. Each LED trouble light has an effective range that approximately
covers a 5-8' radius with 10-15 foot candles of light. Unlike fragile incandescent and compact fluorescent lamps that are made from glass, these
LED bulbs are extremely durable and can live up to the abuse of harsh working conditions. With a lamp life of 50,000 hours, operators are not
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
constantly having to replace burnt out or broken lamps, reducing down time and lowering the amount of spare lamps required at the job site.
Multiple stringer sections can daisy chained together via 5' whips terminated in twist lock connectors, with a maximum of ten stringers daisy
chained together. Alternating hots along between each daisy chained unit allows these string lights to be connected together, up to 10 units end
to end spanning half a mile in length drawing less than 10 amps. Previously, it would have been unrealistic to have a complete assembly
reaching 2500' in length from a single point of power.
Stringer Energy Consumption Comparison
IncandescentCFLLED
Wattage (single unit)100 watts26 watts10 watts
Wattage (total)2,500 watts650 watts250 watts
Amp Draw @ 277V AC9.03 amps2.35 amps0.90 amps
Lamp Life Expectancy1,500 hours8,000 hours50,000 hours
Color Temperature2800K4300K6000K
Operation cost per day
(12hs/day @ 12c/kWh)
Operation cost per month
(12hs/day @ 12c/kWh)
Operation cost per year
(12hs/day @ 12c/kWh)
$3.60$0.94$0.36
$108.00$28.08$10.80
$1,314.00$341.64$131.40
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
Unlike gas burning and arc type lamps that have glass bulbs, LEDs have no filaments or fragile housings to break during operation. Instead of
heating a small filament or using a combination of gases to produce light, light emitting diodes (LEDs) use semi-conductive materials that
illuminate when electric current applied and emitting light. With LED lights, there is no warm up time or cool down time before re-striking and
provide instant illumination when powered on, adding to the reliability of LED technology. By nature, LED light sources run significantly cooler
than traditional lamps, reducing the chance of accidental burns and increased temperatures due to heat emissions. This solid state design of light
emitting diodes provides a more reliable, stable, durable, and energy efficient light source over traditional lighting.
The LED lamps from Larson Electronics' are designed for longevity and durability. Many manufacturers offer plastic heat sinks, which will cause
the LEDs and drivers to fail prematurely. These LED lamps use high quality cast aluminum heat sinks that have been engineered to properly
disperse heat buildup created by the LEDs. This design ensures the LED lamps will continue to operate well after the 50,000 rated lamp life.
Click Photo to Enlarge
Each high output LED lamp produces more light output than standard 100 watt rough serve lamps. The 3D polar distribution curve displays a
standard 100 watt rough service incandescent lamp (red) in comparison to the LED-A19-10-E26-SML high output LED lamp (green) that is used
in this work area string light. The LED lamp visible covers more than twice ground than the 100 watt rough service lamp, and the higher CRI of
the LED lamp provides a better working environment. The cool white color temperature allows operators to see fine details that would not be
clearly visible incandescent lighting.
These LED lamps are suitable for wet areas, extremely long lived, resistant to damage from impacts and vibrations, and consume far less energy
than standard lamps. This tunnel string light is configured to operate with 277 volt electrical current and is equipped with L7-20 male and female
cord caps for twistlock connections. The LED lamps provide more and better quality illumination than 100 watt incandescent string lights without
the high heat and fragile glass construction of traditional lamps. With the low energy requirements of LED lamps, half mile long assembly units
are now physically possible.
Lamp FeaturesSuperior LED Benefits
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
1. 10 Watt LED Lamps
2. 25 Lamps for a total of 250 watts spanning 250' in length.
3. 1,050 lumens per lamp for a total of 26,250 lumens.
4. High output LED lamps provide bright white illumination and better
color rendering compared to the dingy yellow tint of traditional
incandescent lamps. 5. Outdoor approved equipment.
6. No ballast, no flickering, instant on illumination
7. Cage plastic Guards for added protection
8. 277V AC Operation
9. Durable solid state LED construction resists damage from impacts
and vibrations.
10. Hanging hook for hanging and hands free operation.
11. 10' of 12/4 SJTW cable between each light.
12. 250' span of temporary LED work lighting.
13. Daisy chain operations allows connecting multiple stringers
together for maximum work site illumination, while aiding in servicing,
storage, and transport of the tunnel light system.
14. Energy efficient alternative to incandescent and compact
fluorescent temporary string lights.
1. 50,000 hour lifespan.
2. Can SAVE 50% or more on energy.
3. Qualifies retrofit projects for financial incentives, including utility
rebates, tax credits and energy loan programs.
4. Reduces energy use and prolongs life-spans of peripheral cooling
units (A/C, refrigeration)
5. 100% recyclable.
6. No toxins-lead, mercury.
7. No UV light, infrared radiation or CO2 emissions.
8. Qualifies buildings for LEED and other sustainable business
certifications.
9. Bright, even light maintains consistent color over time.
10. Instant on/off – No flickering, delays or buzzing.
11. Very good color rendering.
12. Vibration/impact resistant.
13. Significantly cooler operation.
14. Less frequent outages, higher output improves workplace safety.
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
Specifications / Additional Information
WAL-SL-25-LED-12.4-L7.20 String LightsFeatures
Lamp Type: LEDLower Amp Draw
Lamp Quantity: 25Wet Area Approved
Lamp Watts: 10 wattsHigh Output 10 Watt LED Lamps
Total Watts: 250 WattsDaisy Chain Connection (End to End)
Lumens: 26,250 (1050 per lamp)Spans total length of 250'
Voltage: 277V AC26,250 Lumens of Total Illumination
Amp Draw (Single Unit): 0.90
Amp Draw (10 Units @ Half Mile): 9.03
Total Length Per Unit: 250'
Wiring: 10' 12/4* SJTW Cable Per Unit, 5' WhipsSpecial Orders- Requirements
Cord Cap: NEMA L7-20P* and L7-20C*Contact us for special requirements
Mounting: Eyelet for hook mountingToll Free: 1-800-369-6671
Shipping Dimensions: 24" x 24" x 36"Intl: 1-903-498-3363
Shipping Weight: 125 lbsE-mail: sales@larsonelectronics.com
Warranty: 5 Years**
*While the NEC code prohibits double lugging ground conductors, it
does not prohibit double lugging phase conductors.
**3 year warranty replacement on this LED light (or LED bulbs for light
fixtures with removable LED bulbs). After 30 days, the customer ships
the failed LED light and/or LED bulb to Larson Electronics at their
expense. If the failure is a manufacturer defect, we will ship a new
replacement to the customer. If failure occurs within 30 days of receipt,
Larson Electronics will provide a return label via email to the customer.
When the failed light is returned, Larson Electronics will ship a new
replacement. Please click here to see our 3 Year Warranty pamphlet.
Scroll Down to Purchase-
Part #: WAL-SL-25-LED-12.4-L7.20 (105484)
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com
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Larson Electronics LLC www.LarsonElectronics.com
9419 E US HWY 175, Kemp, TX 75143 Phone: 903.498.3363 Fax: 903.498.3364 Email: sales@LarsonElectronics.com