very nice one man i nominate this for the DIY LINK-O-RAMA!!! never seen a well detailed one with every little part wrote down....maybe you can do a pictorial of how it is construsted or a quick type out for the newbies.....good contribution imo!
i would compare the lumen outputs and the spectrum of which they are because they might be totally different spectrums (color of light) and also check the life of the bulb...