"Comparison field","Offer A","Offer B","Unresolved difference","Source and responsible reviewer" "Exact fixture model and quotation revision","","","","" "Full lifetime-claim wording","","","","" "Measured quantity and wavelength interval","","","","" "Retained fraction and initial reference quantity","","","","" "Stated operating hours","","","","" "Actual test duration versus projected duration","","","","" "Drive-current and thermal/maximum-ambient basis","","","","" "Component / complete-luminaire evidence scope","","","","" "Treatment of failed devices or products","","","","" "Separate driver and other component evidence","","","","" "Projection method and model-specific evidence","","","","" "Warranty term, covered event and actual remedy","","","","" "Unlike bases or missing definition","","","","" "Lighting designer accepted assumption and limits","","","","" "Next evidence request and responsible party","","","","" "Use","Translate the claim before comparing the hours. L/Q letters alone do not settle the measurand. No degradation, replacement-age, yield or payback calculation.","","Manual record; no formulas or automatic approval.","" "Source context","https://designlights.org/our-work/horticultural-lighting/technical-requirements/hort-v4-0/ ; https://designlights.org/dlc_hort_technical_requirements_v4-0_finalpolicy/ ; https://www.usa.lighting.philips.com/application-areas/specialist-applications/horticulture/grow-with-pros/3-tips-to-evaluate-performance-claims-of-led-grow-lights","","",""