Attempted 2008 Q7 Filament lamp / LED

[PJW]

In order to have enough material for answering IRSE questions, certainly expanding your reading is a sensible approach. To be honest I suspect that very few students look up anything but a tiny fraction of the IRSE reading list. I can understand why; however do try to be a bit more widely read; the internet can make this much more easy than it was. For example you can rapidly find good summary articles such as this one on various manufacturers LED signals. These are not likely to answer any one question directly but can help build up that base level of underpinning knowledge which can come in extremely useful when answering questions