Diesel vs. Solar: Best Temporary Lighting for Construction Sites
Compare diesel generator-powered light towers and solar‑powered area lights for large construction sites. Costs, pros, cons, and why solar can save over $300K.
Choosing the right temporary lighting for a large construction site is more important than many teams realize. Good lighting supports safety, productivity, and security. It can also affect your project budget—especially on long builds like a 30‑month datacenter project with more than 1.1 million square feet of parking, laydown, and storage areas.
Below is a clear comparison of the two most common lighting options: diesel generator–powered light towers and solar‑powered area lights.
Project Lighting Overview
Areas: Parking, laydown, and storage zones
Dimensions: 860 FT by 1,350 FT (1,161,000 FT²)
Lighting Target: 0.5-1.0 maintained footcandles
Option 1: diesel generator-powered light towers
Diesel light towers are a familiar sight on construction projects. They run LED fixtures using a built‑in diesel generator. Most contractors rent these units.
Typical Equipment and Costs
Example: Generac MLT4060/80MKV LED Diesel Light Tower
Purchase price: around $16,800
Rental pricing:
Daily: $150–$500
Weekly: $500–$2,000
Monthly: $700–$1,300+
PROS
Reliable in all weather
Scales easily as the jobsite grows
Equipment is widely available
cons
High fuel cost and constant refueling
Regular engine service and downtime
Noise, fumes, and emissions
Adds logistics and safety concerns around fuel handling
Estimated 30‑Month Cost (10 Towers)
Rental: about $270,000
Fuel: about $104,000 per year (site total)
Maintenance: $60,000–$80,000
Total 30‑Month Cost: $590,000–$610,000
Option 2: Solar‑Powered Area Lights
Solar area lights use pole‑mounted solar panels and batteries. They provide consistent lighting without fuel or generators.
purchase cost breakdown
SL‑SAL‑60L on 20 FT pole: about $2,200 × 82 units = $180,400
SL‑SAL‑100L on 25 FT pole: about $3,100 × 28 units = $86,800
Total investment: $267,200
pros
Almost zero operating cost
Silent and emissions‑free
No fuel deliveries or generator maintenance
Can be reused or resold after the project
Supports sustainability goals
cons
Higher upfront cost
Dependent on sunlight and battery sizing
Requires installation planning for pole locations
diesel vs solar quick comparison
FEATURE
DIESEL LIGHT TOWERS
SOLAR AREA LIGHTS
Upfront Cost
Operating Cost
Noise/Emissions
Weather Dependence
Logistics
Best For
Lower
High
Yes
No
Fuel deliveries and service
Short-term projects
Higher
Very Low
None
Yes
Minimal
Long-term, sustainable builds
Conclusion: Solar Lighting Saves Over $300K
For long‑term, large‑scale construction projects, solar lighting offers major financial and operational advantages. With over $300,000 in potential savings, no fuel requirements, and reduced maintenance, solar lighting is the best choice for sites that run for a year or longer.