wolfram, don't waste your money (and energy) on these. I have one which uses similar technology (mine is in a linear form). They use old style DIP LEDs, whose efficiency is very low. Here is a bit of easy-to-read info:
http://www.hitlights.com/blog/compa...n-led-technologies-dip-vs-smd-vs-cob-vs-mcob/
This page says 35-80lumen/W for DIP (I assume for white LEDs). That is lower than T8 florescent bulbs. Lumen is not a good measure for red/blue type LEDs as RSS pointed out. But white LEDs are basically blue LED + phosphors. So if the white LEDs are inefficient, it's likely the monochromatic LEDs of similar technology is inefficient. DIP LEDs can't manage the heat issues easily, so this is a part of the reason for the inefficiency.
You can squeeze out 140-150lm/W from modern white LEDs (driven soft) in comparison.
Hyperikon hybrid T8 LED seems to have a promising spec (2200 lumen per 18W, which is 122 lm/W). If you can't do DIY and If you can't initially afford the efficient fixtures, this might be a good fit. It can be used with T8 ballast, but it is better to modify the wiring to remove the ballast (for better efficiency).
If you can make a group buy (direct from China), I recently found a highly efficient T8 LEDs (Sunritek, which can be found in Alibaba). They were tested to have 140-150lm/W and near the top efficiency. I was skeptical at first (most of the Chinese ones I tested were pretty disappointing), but after they told me about their design, it is possible. They are driving Epistar 2830 at very soft driving current (35mA). I should be receiving these next week (and I'll see how it works agains my other DIY LEDs). Their older model was tested here and it has the top efficiency:
http://apps1.eere.energy.gov/buildings/publications/pdfs/ssl/caliper_21-3_t8.pdf
The reason I said "group buy" is that you need to order 20 or more to make the shipping cost reasonable. For example, I got 20 x $10, and shipping is about $100, so it became about $15 per bulb. Not a bad price for 150lm/W.
House-hold LED bulbs can be used, but their efficiency isn't so high yet.
Nanoleaf has one of the highest efficiency among A-type bulbs, but it is quite costly at first.