---
title: "Japan LED replacement savings (TEPCO Juryo Dento B, 30 A)"
method: GET
path: "/api/v1/jp-led-savings"
---

# Japan LED replacement savings (TEPCO Juryo Dento B, 30 A)

`GET /api/v1/jp-led-savings`

## Request

- Base URL: `https://kwhmate.com`
- URL: `https://kwhmate.com/api/v1/jp-led-savings`
- Auth: none declared

Runs the same calculator as https://kwhmate.com/jp/led-savings/. Reference: 出典：東京電力エナジーパートナー「従量電灯B」. Arrays: comma-separated. Also accepts POST with a JSON body.

## Query parameters

- `count` integer: Number of lights
- `hours_per_day` number
- `old_watts` number: Watts of one old bulb/tube
- `new_watts` number: Watts of one LED
- `other_kwh` number: Other monthly household use without these lights (kWh)
- `led_cost` number: Total cost of the LEDs (optional, for payback)

## Response `200`

Result with source and page URL

- Result
  - `ok` boolean
  - `calculator` string
  - `title` string
  - `currency` string, nullable
  - `input` object
  - `result` object
  - `estimate` boolean
  - `reference` string: Reference date and official source
  - `page` string, uri
  - `disclaimer` string

## Other responses

- `400`: Invalid input
- `429`: Rate limited (60 requests per minute)

---

[API](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api.md) · [All operations](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api/llms.txt) · [OpenAPI document](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api/revisions/90207915728b?raw)