Philips HF3510 Vs HF3520: Comparing the HF3510 and HF3520

HF3510 or HF3520 – Which is Best for You?

The following account will compare two quality wake-up lights from Philips — HF3510 vs HF3520 — through providing you with an overview of each and then going on to highlight subtle differences between the two. From this, you will get a clear idea as to what each can offer you as well as which model is best suited for you.

HF3510 Wake-Up Light Overview

Clinically Claimed Benefits

The Philips wake up light acts to simulate the sun essentially this has been supported by vast independent clinical research to suggest a number of improvements in the quality of your sleep & how ‘easy’ it is to fall asleep. Then from that you benefit by feeling both more ‘refreshed’ and ‘naturally altert’ for the day ahead.

Features & Aspects

The HF3510 works by essentially building light intensity (over 20 separate light levels) over a period of 30 minutes before your set ‘wake up time’ — which if you haven’t woke up by then, it will perform a natural audio wake up noise (e.g. the sound of wind blowing — where you have a choice of 3 natural sounds or the built-in FM radio), that also gradually grows in volume. There is a snooze button integrated, which is actually the lamp itself given it is touch-sensitive, that allows you get an extra 9 minutes in bed.

Which if you compare to a normal jarring alarm clock that basically sends your body into shock in order to wake up — it makes perfect sense as to why the HF3510 is far more effective & calming on your body, with it being a more natural way to start your day (especially if we relate it back to when we were cave men & women etc.).

Moreover, not only do you get a sun rise simulation, but with the HF3510 you get a dusk simulation too (i.e the sun setting), this has in turn proven to help you get to sleep with greater ease. It also acts as a very decent bed-side lamp for reading too.

Dimensions: 19.2 x 14.6 x 19.9 cm | Weight: 0.81 kg | Rating: 80% (sourced: |

HF3520 Wake-Up Light Overview

Clinically Claimed Benefits

Again, it offers the same intrinsic benefits as the HF3510 listed above, but just give you a brief overview of what some studies have reported e.g. the independent study Metrixlab (2011) conducted found that ‘92% of Philips Wake-up light users find it easier to get out of bed’ and is recommended by the National Sleep Foundation that have also conducted research to suggest it is scientifically proven to be effective. At the worst, it is worth a go (given they provide a money back guarantee scheme), particularly if you have difficulty with sleep in general.

Features & Aspects

The HF3520 is slightly different given that it provides you with greater customization than the HF3510, whereby you can set the ‘build up of light intensity’ from a range between 20 and 40 minutes — so you can test out which one is most effective for you. Moreover, you can choose from 5 natural sounds as well as the FM radio with regards to what ‘natural noise’ to wake up to.

It still offers the same 20 light level intensities gradually working its way from dark red oranges to bright bold yellows for dawn simulation and the opposite for dusk simulation. In all, it really is paving the path in revolutionizing the way we get to sleep. They really are great & are certainly at least worth a go.

Dimensions: 19.2 x 14.6 x 19.9 cm | Weight: 1.1 kg | Rating: 88% (sourced: |

The Difference Between the HF3510 and HF3520

As you can see the only real difference between the two models is that the HF3520 offers you more in the selection of ‘natural sounds’ to wake up to (two more) and a greater range of sun rise simulation (20 minutes to 40 minutes) whereas the HF3510 is fixed at 30 minutes. Additionally, there is also the factor that the HF3520 weighs slightly more too.

Which Wake-Up Light Should You Buy the HF3510 or HF3520?

With a difference of about $20, I would go with the HF3520 (the far more popular model) on the simple basis that you may respond better to i) a pro-longed gradual awakening e.g. 40 mins compared to 30 mins or ii) to a shortened one e.g. 20 mins compared to 30 mins, but the only way for you to test this out is by getting the HF3520 model.

Note: I found that I personally responded marginally better (i.e in terms of how I felt in the morning) with the longer duration of dawn simulation than compared to shorter time frames. But which wake-up light will you buy and why?

iPhone Users Should Consider the Philips HF3550 Wake-Up Light

Those who use either an iPhone or iPod touch should really think about upgrading to the HF3550, where in comparison to the HF3510 & HF3520 — it has a whole range of additional abilities on offer e.g. you can have any of your favorite songs playing upon waking up as well as being able to set up effectively multiple alarms (up to 10). But the most significant aspect is the compatible ‘wake-up light’ app that can ‘track’ your sleeping patterns, allowing you to essentially optimize your unique sleep routine in order to get the most efficient & effective sleep possible — specific to you. Pretty incredible really.

Also, if you have any questions or issues about the comparison of the HF3510 Vs HF3520 (or about the HF3550) then please make them below & if you’ve found this article useful, we’d really appreciate a like or share.