# Unable to dim light to calculated value **URL:** \ **Category:** Flows\ **Created:** [April 4, 2019, 10:19pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444 "2019-04-04T22:19:54Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 4, 2019, 10:19pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/1 "2019-04-04T22:19:54Z")
Hi, I’m trying to dim the light to thew value depends on environment luminosity. The flow doesn’t work and show error. Firmware 2.0.5 Does any body know what it could be? ![IMG_0310](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/3/30ee51dc08faf6cd8c2a7119e70230f4a98c3a1f.jpeg) ![IMG_0311](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/4/4a9a1839492472ef5142d7d22e4f6931bd8759cb.jpeg) ![IMG_0312](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/6/6898368ea813692b98349c406b62d75b57e791f7.jpeg) ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [April 4, 2019, 10:58pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/2 "2019-04-04T22:58:57Z")
Dim value van only be 2 decimals, so you’ll have to round them ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 12:36am UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/3 "2019-04-05T00:36:51Z")
How I can round it? It looks so dummy for modern systems that device can’t round it on his own. ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 12:40am UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/4 "2019-04-05T00:40:42Z")
OK, I found the way but I really can’t imagine why the device driver can’t do that. Thanks for advice. ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [April 5, 2019, 7:11am UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/5 "2019-04-05T07:11:10Z")
You’ll have to send athom a support request for that as it is a build in capability of homey we developers can’t do anything about, and Athom doesn’t read along with this forum. ---
**Author:** ![Simon](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/simon/32/7900_2.png) [@Simon](https://community.homey.app/u/Simon)\ **Post date:** [April 5, 2019, 8:36am UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/6 "2019-04-05T08:36:43Z")
Care to share how you achieved this? I’ve got a topic on that I want this exact thing, i just dont know how to achieve it 😃 ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 1:25pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/7 "2019-04-05T13:25:13Z")
{{round((1000 - variable)/10)/100}} ---
**Author:** ![Rocodamelshekima](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rocodamelshekima/32/8209_2.png) [@Rocodamelshekima](https://community.homey.app/u/Rocodamelshekima)\ **Post date:** [April 5, 2019, 2:39pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/8 "2019-04-05T14:39:07Z")
Or {{round((1000-variable)/1000,2)}} ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 2:57pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/9 "2019-04-05T14:57:29Z")
I’ve tried it doesn’t work for me. The result is always rounded to integer. ---
**Author:** ![Rocodamelshekima](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rocodamelshekima/32/8209_2.png) [@Rocodamelshekima](https://community.homey.app/u/Rocodamelshekima)\ **Post date:** [April 5, 2019, 3:29pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/10 "2019-04-05T15:29:07Z")
Can u show us ur round code? Because this works here: ![chrome_2019-04-05_17-29-36](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/5/5d1b4ffb55ae54bf9ad750a20906a43c02a9825e.png) And plz check for any spaces that don’t belong there 😉 ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 4:19pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/11 "2019-04-05T16:19:21Z")
Sorry, looks like it was my mistake, now it is working. Probably I’ve made a mistake yesterday. Their editor has a bugs so it’s hard to edit formulas. ---
**Author:** ![Alik\_Tabunov](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/alik_tabunov/32/8212_2.png) [@Alik\_Tabunov](https://community.homey.app/u/Alik_Tabunov)\ **Post date:** [April 5, 2019, 4:20pm UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/12 "2019-04-05T16:20:35Z")
By the way, do you know where I can find the list of all functions supported by the Homey logic? ---
**Author:** ![Ruud](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ruud/32/64214_2.png) [@Ruud](https://community.homey.app/u/Ruud)\ **Post date:** [April 6, 2019, 8:42am UTC](https://community.homey.app/t/unable-to-dim-light-to-calculated-value/11444/13 "2019-04-06T08:42:35Z")
I just posted a comment here how I dim the lighting to lux value klik [hier](https://community.homey.app/t/help-light-relative-to-luminance-flow/11347/2?u=ruud)