EMR-TEK Sunset Light Bulb (red)
by EMR-TEK
Red 7 W evening bulb whose posted spectrum peaks at 662 nm with 0% blue. No lumen rating, and at $49.99 it costs twice the other red bulbs.
Specs
| Colour / CCT | Red, peak 662 nm, dominant 628 nm (maker spectrum) |
|---|---|
| Blue light (brand claim) | Removes blue and green; B 0.0% on spectrum printout |
| Dimming | No |
| Flicker data | "Zero flicker" claim, no data |
| Control | Wall switch |
| Power | 7 W, 100-240 V |
| Base | E27 |
| Rated life | 50,000 h (claimed) |
| Warranty | 1 year |
Specs from the manufacturer and the sources listed below. Last verified Oct 21, 2026.
Good
- Posts a spectrum printout with numbers, peak 662 nm and a 0% blue ratio, where most red bulbs show nothing
- Peak sits far from the 480 to 490 nm range the body clock responds to most
- 100-240 V, so it works on any mains supply
Not so good
- No lumen rating anywhere on the product page, so you cannot judge brightness
- $49.99 sale price (regular $59.99), about double the Bon Charge and BlockBlueLight red bulbs
- Non-dimmable
- E27 base, the European size, not the US E26 standard; EMR-TEK lists no voltage, so check it runs on 120 V before buying in the US
The Sunset is a red bulb for the room you are in right before sleep. Its main advantage over other red bulbs is that EMR-TEK shows a spectrum printout with numbers on it. The printout, from an Everfine HAAS-1200 spectroradiometer, gives a peak at 662.3 nm, a dominant wavelength of 627.8 nm and a colour ratio of 96% red, 3.9% green and 0% blue. That is a deeper red than the 625 to 630 nm claimed for the Bon Charge red bulb and the Hooga sleep bulb.
The printout does not name a lab or a sample, so treat it as a maker figure. Still, a red LED peaking near 660 nm puts out very little in the 480 to 490 nm range that drives melatonin suppression. In a 12-person lab study, red light at 40 lux did not reduce nighttime melatonin while blue light at the same level did (Figueiro and Rea, 2010).
What it does badly: there is no lumen figure, so you cannot tell whether it is bright enough to read by. It is non-dimmable by design; EMR-TEK says dimmers cause flicker but publishes no flicker measurement. It has an E27 base, the European size, and EMR-TEK lists no voltage rating, so confirm it runs on 120 V before buying for a US socket.
The price is the biggest drawback. At a $49.99 sale price (regular $59.99) it costs about twice the Bon Charge bulb. EMR-TEK also sells a 3-pack for $99.99. For early-evening living rooms, the brighter amber Sweet Dreams bulb is easier to live with. For night-time hallway trips, the Twilight red night light puts out far less light.
Sources
Alternatives
- Best amber bulbBlockBlueLight Sweet Dreams Sleep Light Bulb$22
- Best smart bulbPhilips Hue White Ambiance A19 (1100 lm, 2-pack)$55
- Best red bulbBon Charge Blue Light Blocking Light Bulb (red)$25
- LIFX SuperColor A19 (1100 lm)$25