What’s New


The TCP connect system is white-only and can produce 800 lm.

Smart LED bulbs differ by wireless control and light color

Several new smart bulbs are scheduled to be introduced in June at Light Fair 2104 in Las Vegas. So while we wait, here’s a look at the smart bulb currently available. (See Table 1 below.) I’m defining a smart bulb as any light bulb that can be controlled by your phone, using some form of […]

Recent Articles

Intellitube LED T8 tube sross-section

Review: Intellitube LED T8 lamp works with/without ballast

What if you want to use a replacement LED lamp in your existing fluorescent fixture, but you’re concerned about the limited lifetime of the ballast? After all, few fluorescent ballasts can match the lifetime of an LED lamp. If that’s the case, consider the Intellitube lamp from Energy Focus, which can work with either a T8 […]

Cree LED TW T8 spring clip

Cree voluntarily recalls new LED T8s

Recently I saw a plaintive tweet from @SalCan, Director of Product at Ziff Davis, asking “Where can I buy a Cree T8 LED?” Apparently there were none to be had. Strange, I thought — Cree just introduced them, and there initially seemed to be lots in my local Home Depot. Now the reason behind the missing LED […]


Teardown: $2.50 Philips Everyday 8.5W bulb works, looks just fine

The Philips Everyday 8.5W LED bulb sells at Home Depot for 2 for $5 — a great price for a 60W-equivalent LED bulb, especially one from a major manufacturer. Note that this bulb does not dim. It performs well, and claims a minimum CRI of 80. The MK350 spectrometer measured 82 CRI and a spectral […]

Hairpin lens iphone_cropped

Smartphone microscope takes LED teardown photos

I often need to take photos of deconstructed LED, lights, or drivers and look at them at a much smaller than normal scale. For this purpose I bought an eScope a couple of years ago. This was not an ideal instrument: The software is difficult to work with and requires tweaking to work with a […]