# Three-phase method in Ladybug Tools 1.2

**URL:** <https://discourse.ladybug.tools/t/three-phase-method-in-ladybug-tools-1-2/14611>\
**Category:** ladybug-tools\
**Tags:** daylight, honeybee\
**Created:** [May 25, 2021, 6:22pm UTC](https://discourse.ladybug.tools/t/three-phase-method-in-ladybug-tools-1-2/14611 "2021-05-25T18:22:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JWKodomo](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/j/7cd45c/32.png) [@JWKodomo](https://discourse.ladybug.tools/u/JWKodomo)\
**Post date:** [May 25, 2021, 6:22pm UTC](https://discourse.ladybug.tools/t/three-phase-method-in-ladybug-tools-1-2/14611/1 "2021-05-25T18:22:14Z")

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Hi! I am new to the Honeybee tools. I wonder if I can conduct the three-pahse daylight simulation using the latest Honeybee tool (version 1.2.0)? If so, which recipies should I use? (I can only find annual daylight, annual radiation, daylight factor and direct sun hours on the HB-Radiance tab. Should I install the Honeybee [+]?)

Also, I saw in posts like [this](https://discourse.ladybug.tools/t/3-phase-method-example-file-direction-of-windows/2520) that there are a tutorial and some examples on the three-phase method with Honeybee. However, I can’t find it on Google. I wonder if someone could kindly share a link to the material if it is still available?

Thank you.

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**Author:** ![chris](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/chris/32/10179_2.png) [@chris](https://discourse.ladybug.tools/u/chris)\
**Post date:** [May 26, 2021, 1:57am UTC](https://discourse.ladybug.tools/t/three-phase-method-in-ladybug-tools-1-2/14611/2 "2021-05-26T01:57:33Z")

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I know @mostapha is working on this one for LBT whenever he gets the time. Hopefully, it should be in the next stable release.

If you absolutely need 3-phase now, then you should install Honeybee[+]. If you reinstall the LBT plugin after you install HB[+], you can have both plugins installed side-by-side without conflicting with one another.

I can also really recommend the 2.5-phase method used by the annual daylight and radiation recipes of the LBT plugin since it models the direct solar radiation to a level of accuracy that’s just not possible with 3-phase because it breaks everything down into patches.

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**Author:** ![JWKodomo](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/j/7cd45c/32.png) [@JWKodomo](https://discourse.ladybug.tools/u/JWKodomo)\
**Post date:** [May 26, 2021, 2:26am UTC](https://discourse.ladybug.tools/t/three-phase-method-in-ladybug-tools-1-2/14611/3 "2021-05-26T02:26:30Z")

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Thank you, @chris.  
Is there a way to get the view matrix from the glazing to a point in a room (like the rfluxmtx in Radiance) using the annual daylight and radiation recipes of Honeybee?