A total of 2 reviews of this product on Reddit.
LED bulbs tend to be cooler to the touch than other bulbs. They radiate much less energy as heat than incandescents, for instance. However, their lifespan is still affected by their operating temperatures. LED bulbs contain relatively large heatsinks to draw heat away from the LEDs and dissipate it to the surrounding environment.
Mounting them upside down is mostly problematic when the immediate environment traps the heat near the bulb or otherwise restricts airflow. A desk lamp such as this traps heat around the bulb reducing it’s lifespan. (It is worth noting that LEDs don’t tend to fail suddenly… typically they will start putting out less lumens over time.)
Here’s some info from Energy Star, so you don’t have to take my word for all of it:
> LEDs and Heat
> Because LED lighting systems don’t radiate heat the way an incandescent or halogen light bulb does, the heat produced from the power going into the product must be drawn away from the LEDs. This is usually done with a heat sink, which is a passive device that absorbs the heat produced and dissipates it into the surrounding environment. This keeps LEDs from overheating and burning out. Thermal management is probably the single most important factor in the successful performance of an LED product over its lifetime because the higher the temperature at which the LEDs are operated, the more quickly the light will degrade, and the shorter the useful life will be.
> After less than a year of use, a poorly designed LED product can flicker, shift in color, look dim, offer uneven light, or continue to use power when turned off, among other problems.
> LED products use a variety of unique heat sink designs and configurations to manage heat, so they may look very different from each other. Regardless of the heat sink design, all LED products that have earned the ENERGY STAR have been tested to ensure that they properly manage the heat so that the light output is properly maintained through the end of its rated life.
So, yes, they will work upside down. Whether or not this will reduce their lifetime depends on how effectively it can dissipate heat while upside down.
I suggest you get a gooseneck lamp like this; http://www.amazon.com/Boston-Harbor-TL-TB-170-BK3L-Flexible-Black/dp/B002SDNSF6/ref=sr_1_4?s=lamps-light&ie=UTF8&qid=1420660173&sr=1-4
Then get an LED grow bulb like this;
Then you can germinate indoors away from the cold windows. You quite possibly may be able to grow some of the herb plants to a harvesting size just using the lights.
Also a heatmat like the following will help raise the soil temps;