Smartatest
FreeLiveLast verified 24 Sept 2026
Swedish calculators for lighting lumens, appliance electricity cost, and barcode country prefixes.
Example request
curl -s 'https://smartatest.se/api/v1/watt-till-lumen?watt=60'
Free tier, in plain English
Completely free, no key or signup, capped at 60 calls per minute per IP address.
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