# lightbulbsurplus.com

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 2 of 5 capability checks passed.

- host: lightbulbsurplus.com
- url: https://lightbulbsurplus.com/
- category: lighting store
- type: ecommerce
- country: US
- locations: United States
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 2 of 5 checks passed.

- PASS — Markdown negotiation
- fail — Markdown twin at a predictable URL
- PASS — llms.txt
- fail — API catalog
- fail — MCP server answers

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **buy** — "Shop Now" → `https://lightbulbsurplus.com/light-bulbs/led/`
- **buy** — "Shop Now" → `https://lightbulbsurplus.com/fixtures/indoor/`
- **buy** — "Shop Now" → `https://lightbulbsurplus.com/fixtures/outdoor/`
- **buy** — "Shop Now" → `https://lightbulbsurplus.com/globes/`
- **buy** — "Shop Contractor Essentials" → `https://lightbulbsurplus.com/contractor-essentials/`
- **contact** — "Call us: 888-553-5655" → `tel:8885535655`

## Summary

LightBulbSurplus.com offers over 30,000 lighting products including bulbs, globes, fixtures, and replacement parts with case quantity pricing and US-based support.

## Context

12 sites in this index share the category "lighting store"; 12 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark