We can do the calculations for your buildings light need, just send us an email with your building dimensions, and your required lux (we recommend no less than 60 footcandles / 600 lux). If you want to try the calculation yourself, you will need the SKU / model number of the light and go HERE
Most lights are DLC or cULus approved, but please read the pdf file/description for each light.
Not all lights qualify for rebates, please check with your local power company. Find some rebate info for your area here: Rebates