# How to store data in JSON file in Node-RED

**URL:** https://discourse.nodered.org/t/how-to-store-data-in-json-file-in-node-red/6480
**Category:** General
**Created:** [6 January 2019 23:56 UTC](https://discourse.nodered.org/t/how-to-store-data-in-json-file-in-node-red/6480 "2019-01-06T23:56:57Z")
**Posts on this page:** 1
**Showing post:** 18

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### Author: ![hazymat](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/hazymat/32/108159_2.png) [@hazymat](https://discourse.nodered.org/u/hazymat)
#### Post date: [11 January 2019 16:55 UTC](https://discourse.nodered.org/t/how-to-store-data-in-json-file-in-node-red/6480/18 "2019-01-11T16:55:03Z")

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Okay - so to extend this subject, I'm thinking about designing some form of schema that can support different types of light to be included in a "scene".

As I see it, the different types of light you might want to control would be:

- Single colour (e.g. 0-255) - could also apply to e.g. rollerblinds
- RGB
- RGBW
- RGBWW (I think these are RGB LED strips with TWO additional whites, cool white and warm white)

How about an internal lookup JSON file, which specifies a mapping between colour names and values (e.g. red=255,0,0; salmon=250,128,114... etc)

So the scene definitions might be stored like this. **Is this a vaguely sensible idea?** Is there a better way?

Should I work towards creating my own node type to handle this stuff? Could it be useful for other people? (I've never created a node before, would be interested in giving it a go...)

```
[
  {
    "lightingzone":"3F_Bedroom",
    "scene":"0",
    "scenename":"All Off",
    "ceiling":"0",
    "wall":"0,0,0",
    "floor":"0,0,0,0",
    "rollerblind":""
  },
  {
    "lightingzone":"3F_Bedroom",
    "scene":"1",
    "scenename":"Bedtime",
    "ceiling":"5",
    "wall":"10,10,10",
    "floor":"10,10,10,10",
    "rollerblind":"255"
  },
  {
    "lightingzone":"3F_Bedroom",
    "scene":"2",
    "scenename":"Reading",
    "ceiling":"0",
    "wall":"150,150,0",
    "floor":"0,255,0,255",
    "rollerblind":"0"
  },
  {
    "lightingzone":"3F_Bedroom",
    "scene":"3",
    "scenename":"Work",
    "ceiling":"255",
    "wall":"150,150,0",
    "floor":"0,255,0,255",
    "rollerblind":"150"
  },
  {
    "lightingzone":"3F_Bedroom",
    "scene":"4",
    "scenename":"Getting Dressed",
    "ceiling":"255",
    "wall":"150,150,0",
    "floor":"0,255,0,255",
    "rollerblind":"150"
  },
  {
    "lightingzone":"3F_Bedroom",
    "scene":"5",
    "scenename":"Full",
    "ceiling":"255",
    "wall":"255,255,255",
    "floor":"255,255,255,255",
    "rollerblind":"0"
  }
]
```

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