Epomaker already has a comprehensive line-up of wireless mechanical, Hall-effect, and even inductive keyboards, but some of the company's more interesting launches have been in the low-profile space, with recent examples including the carbon fiber Carbon 60 mechanical keyboard. Now, though, Epomaker has officially launched the Luma40, which may turn out to be far more controversial for regular users than any previous releases. Not only does the Luma40 take the small form factor to the extreme, slashing the key count to just 47 keys—similar to the Comaker TH40 we previously reviewed —it also features an ortholinear layout, meaning the keys are not staggered, or horizontally offset from one another. The Luma40 is available on the Epomaker online store for $115.99 , with a launch discount bringing the price down to $98.59. It is only available in one color, with a single switch option: Kailh White Rain low-profile switches with a full POM construction and middle-weight 50 gf actuation force.

Despite the unorthodox layout and form factor, the Luma40 uses a standard qwerty layout in its stock form, although ortholinear layouts are famous for allowing customization. The Luma40 opens up customization with the open-source VIA web app, which allows you to remap keys, create macros, and select different backlighting modes and colors. The same is true for the keycaps. With the exception of the dual 2U space bars, the Luma40's keycaps feature the LAK profile, meaning they're all interchangeable, so remapping the entire keyboard to your liking, or even testing exotic layouts like Dvorak is made easy. Those keycaps are also made of transparent PC with screen-printed legends. This will allow for full RGB shine-through using the north-facing backlighting, but it also means the keycap legends will likely not be as durable as something like double-shot PBT. Those keycaps sit atop Kailh low-profile switches mounted in a PC plate and CNC-cut aluminium case. The Luma40 has both Bluetooth and 2.4 GHz connectivity options, with a diminutive 1,450 mAh battery delivering an estimated 7 hours of battery life with the RGB at full brightness and 75 hours with no backlight. There's also the option of running it off the USB Type-C wired connection instead.