add value between 0 / 100 in body of mail
Send IFTTT an email at firstname.lastname@example.org with a hashtag in the subject (e.g. #IFTTT) and this Trigger fires. You can optionally add a single file attachment (up to 30MB) and IFTTT will create a public URL to the file as an Ingredient.
This Action will dim or brighten your hue lights to a value between 0-100.
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Email and Philips Hue