diff --git a/client.go b/client.go
index 49743a2..e6878f5 100644
--- a/client.go
+++ b/client.go
@@ -201,6 +201,35 @@ func (c *Client) setState(selector string, state State) (*Response, error) {
 	return resp, nil
 }
 
+func (c *Client) breathe(selector string, breathe Breathe) (*Response, error) {
+	var (
+		err  error
+		j    []byte
+		req  *http.Request
+		r    *http.Response
+		resp *Response
+	)
+
+	if j, err = json.Marshal(breathe); err != nil {
+		return nil, err
+	}
+
+	if req, err = c.NewRequest("POST", EndpointBreathe(selector), bytes.NewBuffer(j)); err != nil {
+		return nil, err
+	}
+
+	if r, err = c.Client.Do(req); err != nil {
+		return nil, err
+	}
+
+	resp, err = NewResponse(r)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}
+
 func (c *Client) setStates(selector string, states States) (*Response, error) {
 	var (
 		err  error
diff --git a/endpoints.go b/endpoints.go
index 6db0c5b..55ecd51 100644
--- a/endpoints.go
+++ b/endpoints.go
@@ -32,4 +32,7 @@ var (
 	EndpointToggle = func(selector string) string {
 		return BuildURL(Endpoint, fmt.Sprintf("/lights/%s/toggle", selector))
 	}
+	EndpointBreathe = func(selector string) string {
+		return BuildURL(Endpoint, fmt.Sprintf("/lights/%s/effect/breathe", selector))
+	}
 )
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..e020976
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module git.kill0.net/chill9/lifx-go
+
+go 1.16
diff --git a/lights.go b/lights.go
index 6137cd2..bce546f 100644
--- a/lights.go
+++ b/lights.go
@@ -86,6 +86,16 @@ type (
 	Toggle struct {
 		Duration float64 `json:"duration,omitempty"`
 	}
+
+	Breathe struct {
+		Color     Color   `json:"color,omitempty"`
+		FromColor Color   `json:"from_color,omitempty"`
+		Period    float32 `json:"period,omitempty"`
+		Cycles    float32 `json:"cycles,omitempty"`
+		Persist   bool    `json:"persist,omitempty"`
+		PowerOn   bool    `json:"power_on,omitempty"`
+		Peak      float32 `json:"peak,omitempty"`
+	}
 )
 
 func (c *Client) SetState(selector string, state State) (*LifxResponse, error) {
@@ -219,3 +229,26 @@ func (c *Client) PowerOn(selector string) (*LifxResponse, error) {
 func (c *Client) FastPowerOn(selector string) {
 	c.SetState(selector, State{Power: "on", Fast: true})
 }
+
+func (c *Client) Breathe(selector string, breathe Breathe) (*LifxResponse, error) {
+	var (
+		err  error
+		s    *LifxResponse
+		resp *Response
+	)
+
+	if resp, err = c.breathe(selector, breathe); err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.IsError() {
+		return nil, resp.GetLifxError()
+	}
+
+	if err = json.NewDecoder(resp.Body).Decode(&s); err != nil {
+		return nil, err
+	}
+
+	return s, nil
+}
\ No newline at end of file