Hi all,
Don't know if this has been covered before, but if not these are just superb for outside the observatory door or anywhere else you can think of out doors. About 12 months ago I bought the Dorcy model below from Mitre 10 for around $45. It runs off 3 D cell batteries and I have not had to replace them yet despite a fair bit of time down in the observatory area. They are very easy to install and incredibly bright with 2 settings for brightness and time on (30 seconds and 2 minutes).
http://www.motionsensorsecuritylight...or-flood-lite/
The one listed below is also available from Mitre 10 and is available in White for Sirius dome owners.
http://www.mitre10mega.co.nz/shop/ga..._black_119765/
PeterM.
