Ebay MH bulbs

[runway1]

Anybody ever try these?

http://cgi.ebay.com/175-W-Watt-1400...ryZ46314QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/175-W-Watt-1400...ryZ46314QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

One fits an "E26" mogul and this one:
http://cgi.ebay.com/175-Watt-14-000...ryZ46314QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

fits an "E39" mogul. What's thr diff? Thanks.