Update: March 2021
A review of the LIVARNO LUX outdoor spotlight will soon be uploaded; it has been recorded and is going through the editing process.
I've concentrated this time on the light fitting itself, rather than the theory behind the light fixture and the supplied light bulb (a 23W, 6500K daylight CFL light bulb).
I've covered the ease of replacing the light bulb, as well as the different types of light bulb you could use with this fixture, their brightness (including comparison to the 23W CFL), as well as bypassing the PIR motion detection unit in its entirety (and yes, this does work).
As for a suitable light bulb, I'd recommend a 60W/800 lumen equivalent LED light bulb (approximately 6-9W) or better, though for a softer illumination as a low intensity night light or backlight, a 40W/470 lumen equivalent (4-6W) LED light bulb would also be OK. For matching the light output of the supplied light bulb, a 1200 lumen LED light bulb (12W LED, equivalent to a 75-100W incandescent) is recommended.
I'd only recommend using a CFL light bulb if your intention is to disconnect the PIR motion sensor, and control the light bulb via other means (e.g. a timer, a photocell, or a switch) that leave the light bulb running for longer periods of time.
Note the
following information from Wikipedia, that is relevant:
"CFLs are generally not designed for outdoor use and some will not start in cold weather. CFLs are available with cold-weather ballasts, which may be rated to as low as −28.8°C (−20°F). Light output in the first few minutes drops at low temperatures."
"Some CFLs are marketed as "instant on" and have no noticeable warm-up period, but others can take up to a minute to reach full brightness, or longer in very cold temperatures. Some that use a mercury amalgam can take up to three minutes to reach full output. This and the shorter life of CFLs when turned on and off for short periods may make CFLs less suitable for applications such as motion-activated lighting."
This information basically confirms what I mentioned in the first review video, as well as my overall viewpoint towards this type of product: the characteristics of the supplied light bulb does not match the characteristics of the light fitting, and the light bulb ideally needs replacing with a suitable LED light bulb.
Note that I would not recommend using a high power incandescent or halogen light bulb with this light fitting, due to power considerations. The light fitting is designed for use with light bulbs up to 23W, hence using a 60W or higher incandescent or halogen light bulb will likely cause problems with regards to heat generation and current draw. Having said this, you should be OK with a 25W incandescent lamp or a 28W halogen lamp, if used as a low power background light, for low intensity illumination - especially if used with the lower time adjustment settings (e.g. 5 minutes or less).
The main redeeming factor about this light fitting is that the lamp is user replaceable, thus easily allowing a conversion to a suitable LED lamp. The socket is a standard E27 screw in lamp socket, unlike modern slimline LED light bulbs which have non-replaceable LED panels.
Link will be posted when the video is up