The 3.8.1 LIFX app update adds HomeKit support for LIFX, LIFX GU10, LIFX Downlight, and LIFX+ bulbs. It's only the third-generation bulbs that work with HomeKit -- original bulbs and LIFX White 800/Color 1000 won't work, nor will the company's LED strips.
A firmware update is required to enable support, with the app able to provide a HomeKit code for lights that did not ship with one. From there, the bulbs can be added to a HomeKit setup like any other product.
LIFX bulbs are similar to the Philips Hue line of bulbs, offering a range of color and white selections that can be controlled with a smartphone. LIFX bulbs do not require a hub and are controlled over Wi-Fi.
Pricing on LIFX bulbs starts at $59.99, but multiple bulbs can be purchased for a discount. LIFX bulbs can be bought from the LIFX website.