Lumie Bodyclock Spark 100 vs Glow 150

The Lumie Bodyclock Glow 150 is our pick for a wake up light with adjustable timing and built-in sounds: choose a 20, 30 or 45-minute sunrise and sunset. Choose Spark 100 if a fixed 30-minute fade and an optional beep cover your routine. Both use controls on the clock, and both require you to activate the alarm before bed each time.

• 30 minSpark 100 sunrise and sunset duration: fixed
• 20, 30 or 45 minGlow 150 sunrise and sunset duration: selectable

Quick picks: the differences that matter

Choose Glow for timing and sound choices; choose Spark for fewer settings. These are our recommendations from Lumie's specifications and manuals, not a report of physical testing. For automatic weekly alarms or FM radio, consider Shine 300 instead.

Compare specifications and all conditions

Sunrise and sunset duration

Bodyclock Spark 100

Fixed 30 minutes

Bodyclock Glow 150

20, 30 or 45 minutes, set separately

Final sunrise brightness

Bodyclock Spark 100

Levels 1–5; light can also be disabled

Bodyclock Glow 150

Levels 1–5; light can also be disabled

Sound at alarm time

Bodyclock Spark 100

Optional beep

Bodyclock Glow 150

Ten choices, including the beep

Sound during sunset

Bodyclock Spark 100

No sound menu

Bodyclock Glow 150

Nine sounds; beep excluded

End of sunset

Bodyclock Spark 100

Off or a selected nightlight level

Bodyclock Glow 150

Off or a selected nightlight level

Clock display in a dark room

Bodyclock Spark 100

OFF or LOW via base switch

Bodyclock Glow 150

OFF or LOW via base switch

Alarm routine

Bodyclock Spark 100

Activate before bed each time

Bodyclock Glow 150

Activate before bed each time

Snooze

Bodyclock Spark 100

Tap control; 9 minutes

Bodyclock Glow 150

Tap control; 9 minutes

Supplied adapter output

Bodyclock Spark 100

12 V DC, 1 A

Bodyclock Glow 150

15 V DC, 1 A

Size, height × width × depth

Bodyclock Spark 100

16 × 19 × 12 cm

Bodyclock Glow 150

16 × 19 × 12 cm

Full comparison table ↔

Swipe to compare. Row labels stay visible.

Buying question	Bodyclock Spark 100	Bodyclock Glow 150
Sunrise and sunset duration	Fixed 30 minutes	20, 30 or 45 minutes, set separately
Final sunrise brightness	Levels 1–5; light can also be disabled	Levels 1–5; light can also be disabled
Sound at alarm time	Optional beep	Ten choices, including the beep
Sound during sunset	No sound menu	Nine sounds; beep excluded
End of sunset	Off or a selected nightlight level	Off or a selected nightlight level
Clock display in a dark room	OFF or LOW via base switch	OFF or LOW via base switch
Alarm routine	Activate before bed each time	Activate before bed each time
Snooze	Tap control; 9 minutes	Tap control; 9 minutes
Supplied adapter output	12 V DC, 1 A	15 V DC, 1 A
Size, height × width × depth	16 × 19 × 12 cm	16 × 19 × 12 cm

Buying question	Bodyclock Spark 100	Bodyclock Glow 150
Sunrise and sunset duration	Fixed 30 minutes	20, 30 or 45 minutes, set separately
Final sunrise brightness	Levels 1–5; light can also be disabled	Levels 1–5; light can also be disabled
Sound at alarm time	Optional beep	Ten choices, including the beep
Sound during sunset	No sound menu	Nine sounds; beep excluded
End of sunset	Off or a selected nightlight level	Off or a selected nightlight level
Clock display in a dark room	OFF or LOW via base switch	OFF or LOW via base switch
Alarm routine	Activate before bed each time	Activate before bed each time
Snooze	Tap control; 9 minutes	Tap control; 9 minutes
Supplied adapter output	12 V DC, 1 A	15 V DC, 1 A
Size, height × width × depth	16 × 19 × 12 cm	16 × 19 × 12 cm

Sources for the table: Lumie's Spark US page, Glow US page, and their Spark manual and Glow US manual.

Best for adjustable routines: Bodyclock Glow 150

Buy Glow if you can name a setting you'll use: a shorter morning sunrise, a longer evening sunset, or waves instead of a beep. Its manual provides separate duration menus for sunrise and sunset, so they do not have to match. The sound is optional; you can use a light-only alarm, or disable the sunrise and select an audible alarm.

Its ten alarm choices are beep, tropical birds, blackbird, cafe, goats, steam train, thunderstorm, waves, crickets and white noise. The sunset menu contains the nine non-beep sounds. That distinction matters: "ten sleep/wake sounds" does not mean ten nature recordings plus a separate beep, or ten bedtime choices. These are built-in selections made on the clock.

The upgrade is most useful when you want those extra choices. Both US pages list warm-white, orange and red LEDs, adjustable sunrise intensity and dimmable bedside lighting; those shared specifications do not establish that Glow produces a brighter sunrise.

See the Bodyclock Glow 150 US kit at Lumie.

Best for a simple light-and-beep alarm: Bodyclock Spark 100

Choose Spark if you want to set an alarm time, select the final light level and decide whether to add a beep. Its sunrise and sunset durations are fixed at 30 minutes, so you give up Glow's duration menus and sound library. You still get a sunset that can finish completely off or at a chosen nightlight level.

The manual gives the sunrise five final brightness levels and the beep five volume levels, with zero disabling either function. If you disable the sunrise, you must select a beep instead. For a light-only alarm, leave the light enabled and set the beep volume to zero.

Spark also works as a dimmable bedside lamp: use the minus and plus buttons to change the light level, and hold minus to turn it off. That makes it our pick for someone who wants the core light sequence and has no interest in choosing an audio track.

See the Bodyclock Spark 100 US kit at Lumie.

Buying guide: living with either clock

The alarm needs a nightly button press

The most consequential shared limitation is easy to miss in a feature list: both manuals say to activate the alarm before going to sleep each time. Setting an alarm time is not the same as arming it. Press the alarm button and check for the alarm symbol before bed; make that part of the recipient's setup demonstration if this is a gift.

To change the alarm settings, hold the alarm button, adjust values with minus/plus and advance with the next button. Sunset settings have their own button and menu. Neither manual requires an app, account, Wi-Fi connection or content subscription for these controls. Our app-free recommendation follows those documented operating instructions.

At alarm time, tapping the cover snoozes for 9 minutes; pressing any button stops the sunrise alarm and its sound. The manuals then say to hold minus to switch the light off. Lumie's support pages suggest tapping nearer the bottom of the unit if cover taps do not register reliably. That is official troubleshooting advice, not something we have assessed ourselves.

A dark display and a dark lamp are separate choices

Both clocks have a light-sensitive display and an OFF/LOW switch underneath. Select OFF if you want the display to disappear in a dark room; tap the cover to show the time briefly at low brightness. Select LOW if you prefer to see it continuously. You do not need Glow just to get this choice.

The sunset's nightlight setting is separate. Set it to zero for the lamp to fade completely off, or choose a nightlight level to leave illumination on. In a shared bedroom, agree on the final sunrise intensity, sound and nightlight settings before deciding which model to buy.

Why the sunset can seem too short

Lumie's support pages say the full sunset duration assumes a start at full brightness. Starting halfway up the brightness range gives half the time to darkness. Start at full brightness when checking the advertised fade, and check that the nightlight setting is zero if you expect complete darkness at the end. This behavior applies to both models.

What survives a power interruption

Both manuals say the clock keeps time for 30 minutes without power and all other settings are permanently saved. Read that as setting retention, not a battery-powered sunrise or guaranteed alarm during an outage: the operating instructions require the mains adapter. If missing an alarm would matter, use an independent backup and check the time and alarm activation after power returns.

US kits, regional variants and the complete purchase

Match the model name and the regional identifier. Lumie's US product-page data identifies Spark as NBCKA-0000 and Glow as NBCGA-1000. Its UK pages identify the same product names as NBCKU-0000 and NBCGU-1000, respectively. Those are different regional records; a matching front photo is insufficient to identify the US package. Check the supplied plug before placing the order.

Rise 100 is another model name, not the name of the Spark US kit. Lumie's US store lists Rise separately. For this comparison, look for Spark 100 or Glow 150 and the corresponding US identifier above, rather than treating every Bodyclock “100” as the same product.

The manuals list a supplied mains adapter and instruct you to use it. They specify 100–240 V AC, 50/60 Hz input, but different outputs: 12 V DC, 1 A for Spark; 15 V DC, 1 A for Glow. Do not swap the adapters. A wide input-voltage range also does not identify the physical plug supplied with a regional kit. If buying a replacement or an incomplete package, obtain Lumie's confirmation of the correct adapter for that exact model.

For a complete gift, choose the US clock with its correct supplied adapter, confirm an accessible bedside outlet and allow room for the listed 19 cm width and 12 cm depth. Both US pages give the same footprint. Ask whether the recipient prefers light only, a beep or other audio, and whether they will remember nightly alarm activation. Our sleep gifts guide covers other recipient preferences.

1. 1

   Check the kit

   Match the US model identifier and confirm the correct supplied adapter and plug.

2. 2

   Set the current time

   Connect mains power, then set hours and minutes on the clock.

3. 3

   Choose the morning cue

   Set the alarm time, final sunrise brightness and optional sound; Glow also offers duration choices.

4. 4

   Choose the night settings

   Select display OFF or LOW and decide whether sunset should end dark or at nightlight brightness.

5. 5

   Arm the alarm

   Press the alarm button before bed and check that its symbol appears.

When Shine 300 is the relevant step up

If the nightly arming routine rules out both, examine Bodyclock Shine 300: Lumie's US page lists daily/weekly alarm options, 15–90-minute sunrise/sunset timing, 15 sounds and FM radio. Use its WEEKLY mode: the Shine US manual says DAILY still needs nightly activation, while WEEKLY turns alarms on automatically. Glow adds sound and timing choices over Spark, but it does not provide that weekly scheduling feature. Compare Shine and other designs in our best sunrise alarm clocks guide.

How we choose

We compared Lumie's US product pages, their linked manuals and model-specific support pages, checked November 3, 2026. Raw official page data supplies the regional identifiers. Each model's own instructions establish the menu choices, alarm activation and power retention described here; the guide also identifies the conflicting Glow duration copy.

These are specification-based recommendations. We have not physically evaluated light output, speaker quality or button feel, and we do not infer equal brightness from a shared LED description. Our wider research method is on How we choose.

Verdict

Get Glow 150 if you will use its adjustable fade durations or built-in audio choices. Get Spark 100 if a fixed half-hour sequence and optional beep are enough. For either, check the exact US kit, use the correct adapter and remember the nightly alarm activation; move to Shine 300 if weekly scheduling is your deciding requirement.

Sources

Official documentation checked November 3, 2026:

• Lumie: Spark 100 US, linked manual and Spark support.
• Lumie: Glow 150 US, linked US manual, Glow support and support manual.
• Regional cross-checks: Lumie's UK Spark and UK Glow pages; Shine 300 US.