I think it wont be a pain if it is used only for a couple of mins.
The reason for saying about heatsinks why because recently i had a small DIY with these 1 watt led. When i was searching for the information about the heat sink, I found a watt of LED power needs about 9 square inches of surface area open to the air for the best heat dissipation.
Attaching my recent DIY of 3 1watt led lamp. See the heatsink that i have used in it even this gets hot after a few mins of usage.
Right now its in uplighting setup which is placed over the cupboard in the dinning room.
Obviously its not bright as our regular cfl lamps, but still this 3W LED lamp serves the purpose well enough. So when it comes to a boot space, i think this 3watts lamp will make you look like
.
When you want light of a long time, just make sure to give few seconds of break to cool them.
One more thing is that, even though this is a 3 watts lamp if the manufacturer is not applying the maximum forward current for this leds, then this wont emit much light and heat. so in that case it will be safe to use for a long time.