How do I use the Commercial Daylight Harvesting & Skylight Photocell Sizer?

Enter your specific project or financial parameters into the input fields above. The engine recalculates outputs dynamically in real time and updates visual charts and summary metrics.

Can I export and share these results?

Yes, you can generate shareable state links, export clean CSV spreadsheets, or print high-resolution executive reports with a single click.

Is this calculator free to use?

Yes, all calculation engines on ToolsVault are 100% free with no account registration or paywall required.

Commercial Daylight Harvesting & Skylight Photocell Sizer

🏭 1. Facility & High-Bay Lighting Baseline

Building Area (Sq Ft)

Ceiling Clear Height (ft)

Lighting Power Density (W/sq ft)

Operating Hours (Hrs/day)

Facility Use Type

🪟 2. Prismatic Skylights & Controls

Skylight-to-Roof Ratio (%)

Visible Light Transmittance (VLT)

Skylight Installed Unit Cost ($)

Dimming Controller Cost ($/sq ft)

💡 3. Electricity Tariff & 179D Tax Deductions

Commercial Electric Rate ($/kWh)

Section 179D Tax Deduction ($/sq ft)

Skylight Field Count

125 Skylights

4,000 sq ft Aperture (4%)

Net Turnkey CapEx

$73,750

After 179D Tax Shield

Annual Energy Savings

$37,800/yr

2.0 Yrs Simple Payback

Warehouse High-Bay Electric Lighting Load Reduction 252,000 kWh / yr Saved

Baseline Constant High-Bay Operation 438,000 kWh / yr

With Continuous Photocell Daylight Harvesting 186,000 kWh / yr (57.5% Cut)

Turnkey Equipment & Section 179D Tax Schedule

Scope / Line Item	Metric Quantity	Unit Rate	Amount ($)

20-Year Cumulative Clean Energy Value

$940,000 Net Savings

Prismatic acrylic lenses diffuse sunlight 100% without glare or hot spots, improving warehouse worker ergonomics and pick-accuracy while qualifying for utility demand response incentives.