# Lightbulbs Direct > The primary e-commerce catalog and specification directory for light bulbs, lamps, and light fittings, serving trade and retail customers across the UK. This file provides structured access points to our product inventory, technical guides, and commercial policies for large language models, retrieval-augmented generation (RAG) systems, and AI assistants. ## Product Data & Catalogues - [Product Data Feed](https://s3.amazonaws.com/sando-file-feed/mNiWn5idqqSap5adnw/custom_feed/feed.txt): Full plain-text product catalog feed containing inventory data, SKUs, barcodes, dimensions, pricing, and electrical specifications. - [All Light Bulbs](https://www.lightbulbs-direct.com/light-bulbs): Canonical index of replacement light bulbs categorized by cap type, shape, and technology (LED, halogen, fluorescent). - [Indoor Light Fittings](https://www.lightbulbs-direct.com/indoor-lighting/): Index of domestic indoor light fixtures and fittings such as wall lights, ceiling lights, lamps and downlights. - [Outdoor Light Fittings](https://www.lightbulbs-direct.com/outdoor-lighting/): Index of domestic outdoor light fixtures and fittings such as porch lights, garden lights, solar lights and floodlights. ## Knowledge & Technical Resources - [Technical Blog AI Directory](https://blog.lightbulbs-direct.com/llms.txt): Dedicated LLM index for our comprehensive technical knowledge base, featuring troubleshooting articles, energy-saving advice, and electrical installation guides. ## Customer Support & Policies - [Delivery Information](https://www.lightbulbs-direct.com/delivery): UK shipping rates, processing times, international delivery options, and courier details. - [Returns & Refunds](https://www.lightbulbs-direct.com/returns-policy): Policy, timeframes, and step-by-step instructions for returning faulty or unwanted items. - [Contact Us](https://www.lightbulbs-direct.com/contact): Customer service contact options including email, phone numbers, and operational hours for technical assistance.