Philips Hue Quick Flash of White Light

[JDRoberts]

What are you using for the rule that turns the light on? Can you post a screenshot of that?

Also, I don’t know whether connecting the hue bulb directly to a smartthings hub without the Hue bridge will solve this particular problem, but it introduces a whole host of other ones and it is not recommended by either hue or smartthings.

FAQ: Do I need the Hue Bridge/Hub to Use a Hue Bulb with SmartThings?

Yes. The only officially recommended way to use Hue devices with SmartThings is by using a Hue bridge. There are several reasons to use the bridge. Other Integrations There will be a number of other integrations available to you which you may want to take advantage of. Use of Hue Scenes you will be able to activate scenes created with the official Hue app, which at the present time offer many features not available in the smartthings scenes feature. Even just the ability to blink the lights. The easiest way to access scenes from the Hue app is through the following custom edge driver or IFTTT, but there are other ways as well. [ST Edge] Philips Hue LAN [BETA] (3rd Party Driver, Not ST Native) Not using the Bridge can mess up your zigbee network the most important really is …

Finally, this is probably too obvious, but are you sure it is the bulb flashing and not the motion sensor? There is an indicator flash when motion is detected.