Low power neopixel and wifi

#include <Adafruit_NeoPixel.h>
#include "ESP8266WiFi.h"

#define PIN D4

Adafruit_NeoPixel strip = Adafruit_NeoPixel(10, PIN, NEO_GRB + NEO_KHZ800);

bool discomode = true;

void setup() {
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();

  strip.begin();
  strip.show();

  WiFi.forceSleepBegin();
}

void loop() {

  strip.setBrightness(10);

  rainbowCycle(20);

  WiFi.forceSleepWake();

  WiFi.scanNetworksAsync(prinScanResult);

  discomode = true;
}

void prinScanResult(int networksFound)
{
  uint16_t i, j;

  String wifiname = "test wifi";

  bool found = false;

  for (int i = 0; i < networksFound; i++) {
    if (wifiname == WiFi.SSID(i)) {
      found = true;
    }
  }

  if (found) {
    discomode = false;
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, 255, 255, 255);
    }
    strip.show();
  }


  WiFi.forceSleepBegin();
}


void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for (j = 0; j < 256 * 5; j++) {
    for (i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    if (discomode) {
      strip.show();
    }

    delay(wait);
  }
}

uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}