The Philips Hue ST19 filament bulb is the only HomeKit bulb around that has the classic filament bulb shape. This thinner bulb works great with industrial-style luminaires and keeps things well lit with up to 530 lumens of brightness. The Philips Hue filament line also supports Bluetooth for direct control, as well as the Philips Hue Hub, which allows HomeKit and Siri.
$ 28 at Best Buy
The Sylvania Smart + Filament bulb is the brightest of the groups, illuminating areas with up to 650 lumens of elegant power. This is not, however, because this bulb is also the only one that connects directly to the HomeKit via Bluetooth, giving you Siri and automation without the need for an additional hub. This means that this bulb can be set up quickly and easily right from the Home app.
$ 21 on Amazon
$ 20 at Walmart
The regular A19-shaped bulb from the Philips Hue line houses an elegant spiral design that looks amazing when lit. This glass bulb can emit up to 530 lumens of pure white light, perfect for lighting fixtures or lamps. Because this light bulb is part of the Hue ecosystem, it can slide directly into scenes you may already have and works with accessories such as remote controls.
$ 25 at Best Buy
$ 25 at Walmart
Ikea Tradfri LED Filament Bulb is the cheapest in the group, especially if you already have Tradfri Gateway in your home. This cheap bulb mixes a three-spiral filament like a design with a tinted brown glass globe, giving it the true retro look. The only disadvantage of this bulb is that it is not the brightest, providing an insensitive light of 250 lumens, relegating it to lighting tasks or simply as a decoration.
$ 10 at Ikea
The G25 Hue White Filament bulb has a larger, rounder and clearer globe than in summer, which makes it excellent for wider shades and bodies. This dimmable bulb works with only 7 watts of power and can be set to the ideal light level via the Hue app or through your voice with Alexa, Google Assistant and, of course, Siri. Keep in mind that you will need a Philips Hue Hub to make all those connected goodies happen.
$ 33 at Best Buy
$ 33 at Walmart